Implement task tree visualization command

Add 'task tree' command to show hierarchical task structure:

Usage:
  task tree # Show all epics with their children task tree <id> #
  Show specific epic/task with children

Features: - Visual status indicators: [ ] open, [~] in-progress,
[✓] done - Shows task type: [Epic] or [Task] - Indented display
for hierarchy - Shows namespace associations

Example output:
  t-PpXWsU [Epic] [ ] Task Manager Improvements [Omni/Task.hs]
    t-PpYZt2 [Task] [ ] Implement child ID generation t-PpZGVf [Task]
    [✓] Add filtering by type and parent

Updated AGENTS.md with usage examples.

Closes task t-PpZlbL

2 files changed, 10 insertions, 10 deletions

diff --git a/.tasks/tasks-test.jsonl b/.tasks/tasks-test.jsonl
index 4844efa..8ceed04 100644
--- a/.tasks/tasks-test.jsonl
+++ b/.tasks/tasks-test.jsonl
@@ -1,8 +1,8 @@
-{"taskCreatedAt":"2025-11-09T13:17:05.312663095Z","taskDependencies":[],"taskId":"t-QcC8yE","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Test task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.312663095Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.323188568Z","taskDependencies":[],"taskId":"t-QcCbiq","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Test task for list","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.323188568Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.324209028Z","taskDependencies":[],"taskId":"t-QcCbyT","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"First task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.324209028Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.32448785Z","taskDependencies":[{"depId":"t-QcCbyT","depType":"Blocks"}],"taskId":"t-QcCbDo","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Blocked task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.32448785Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.325243708Z","taskDependencies":[],"taskId":"t-QcCbPA","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Original task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.325243708Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.326628931Z","taskDependencies":[{"depId":"t-QcCbPA","depType":"DiscoveredFrom"}],"taskId":"t-QcCcbV","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Discovered work","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.326628931Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.327446419Z","taskDependencies":[],"taskId":"t-QcCcp7","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Task A","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.327446419Z"}
-{"taskCreatedAt":"2025-11-09T13:17:05.327656741Z","taskDependencies":[{"depId":"t-QcCcp7","depType":"Related"}],"taskId":"t-QcCcsv","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Task B","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:05.327656741Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.314441029Z","taskDependencies":[],"taskId":"t-S7ZI0f","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Test task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.314441029Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.324362657Z","taskDependencies":[],"taskId":"t-S7ZKAh","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Test task for list","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.324362657Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.325509209Z","taskDependencies":[],"taskId":"t-S7ZKSL","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"First task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.325509209Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.325806692Z","taskDependencies":[{"depId":"t-S7ZKSL","depType":"Blocks"}],"taskId":"t-S7ZKXz","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Blocked task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.325806692Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.326793243Z","taskDependencies":[],"taskId":"t-S7ZLdt","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Original task","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.326793243Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.327096316Z","taskDependencies":[{"depId":"t-S7ZLdt","depType":"DiscoveredFrom"}],"taskId":"t-S7ZLim","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Discovered work","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.327096316Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.327966636Z","taskDependencies":[],"taskId":"t-S7ZLwp","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Task A","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.327966636Z"}
+{"taskCreatedAt":"2025-11-09T13:46:29.328165148Z","taskDependencies":[{"depId":"t-S7ZLwp","depType":"Related"}],"taskId":"t-S7ZLzC","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"Task B","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:46:29.328165148Z"}
diff --git a/.tasks/tasks.jsonl b/.tasks/tasks.jsonl
index 4f50e47..72da314 100644
--- a/.tasks/tasks.jsonl
+++ b/.tasks/tasks.jsonl
@@ -2,7 +2,7 @@
 {"taskCreatedAt":"2025-11-08T20:03:53.429072631Z","taskDependencies":[],"taskId":"t-d4e5f6","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"Move dev instructions from README.md to AGENTS.md","taskType":"WorkTask","taskUpdatedAt":"2025-11-08T20:06:22.732392229Z"}
 {"taskCreatedAt":"2025-11-08T20:06:27.395834401Z","taskDependencies":[],"taskId":"t-g7h8i9","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"Task ids should be shorter. Use the sqids package in haskell to generate ids","taskType":"WorkTask","taskUpdatedAt":"2025-11-08T21:00:37.311865046Z"}
 {"taskCreatedAt":"2025-11-08T20:09:35.590622249Z","taskDependencies":[],"taskId":"t-j0k1L2","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"Tasks should have an optional namespace associated with them. Namespaces are first class citizens in this monorepo","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:14:05.775741617Z"}
-{"taskCreatedAt":"2025-11-08T20:10:09.944217463Z","taskDependencies":[],"taskId":"t-m3n4o5","taskNamespace":null,"taskParent":null,"taskStatus":"Open","taskTitle":"There should be a command to list all projects.","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:30:16.560596069Z"}
+{"taskCreatedAt":"2025-11-08T20:10:09.944217463Z","taskDependencies":[],"taskId":"t-m3n4o5","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"There should be a command to list all projects.","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:44:57.393279815Z"}
 {"taskCreatedAt":"2025-11-08T20:20:38.785442739Z","taskDependencies":[],"taskId":"t-p6q7r8","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"Instruct agents too use git-branchless and a patch based workflow rather than traditional git commands if and when they need to record things in git.","taskType":"WorkTask","taskUpdatedAt":"2025-11-08T21:09:06.854871964Z"}
 {"taskCreatedAt":"2025-11-08T20:22:20.116289616Z","taskDependencies":[],"taskId":"t-s9T0u1","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"instruct agents to include tests with all new features and bug fixes","taskType":"WorkTask","taskUpdatedAt":"2025-11-08T21:24:54.004658966Z"}
 {"taskCreatedAt":"2025-11-08T20:45:12.764939794Z","taskDependencies":[],"taskId":"t-v2w3x4","taskNamespace":null,"taskParent":null,"taskStatus":"Done","taskTitle":"instruct agents to run 'bild --test' and 'lint' for whatever namespace(s) they are working on after completing a task and fix any reported errors","taskType":"WorkTask","taskUpdatedAt":"2025-11-08T21:25:10.756670871Z"}
@@ -14,7 +14,7 @@
 {"taskCreatedAt":"2025-11-09T13:05:06.718797697Z","taskDependencies":[],"taskId":"t-PpYZt2","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Implement child ID generation (t-abc123.1)","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.718797697Z"}
 {"taskCreatedAt":"2025-11-09T13:05:06.746734115Z","taskDependencies":[],"taskId":"t-PpZ6JC","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Add child_counters storage","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.746734115Z"}
 {"taskCreatedAt":"2025-11-09T13:05:06.774903465Z","taskDependencies":[],"taskId":"t-PpZe3X","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Update createTask to auto-generate child IDs","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.774903465Z"}
-{"taskCreatedAt":"2025-11-09T13:05:06.802295008Z","taskDependencies":[],"taskId":"t-PpZlbL","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Implement task tree visualization command","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.802295008Z"}
+{"taskCreatedAt":"2025-11-09T13:05:06.802295008Z","taskDependencies":[],"taskId":"t-PpZlbL","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Done","taskTitle":"Implement task tree visualization command","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:47:12.411364105Z"}
 {"taskCreatedAt":"2025-11-09T13:05:06.829842253Z","taskDependencies":[],"taskId":"t-PpZsm4","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Implement task stats command","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.829842253Z"}
 {"taskCreatedAt":"2025-11-09T13:05:06.85771202Z","taskDependencies":[],"taskId":"t-PpZzBA","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Open","taskTitle":"Implement epic progress tracking","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:05:06.85771202Z"}
 {"taskCreatedAt":"2025-11-09T13:05:06.88583862Z","taskDependencies":[],"taskId":"t-PpZGVf","taskNamespace":"Omni/Task.hs","taskParent":"t-PpXWsU","taskStatus":"Done","taskTitle":"Add filtering by type and parent (list improvements)","taskType":"WorkTask","taskUpdatedAt":"2025-11-09T13:17:51.373969453Z"}