Add enhanced filtering to task list command

Implement --status and --namespace filters for task list:

New filters: - --status: Filter by open, in-progress, or done -
--namespace: Filter by namespace (e.g., Omni/Task)

All filters can be combined: - task list --parent=t-abc123
--status=open - task list --type=epic --status=done - task list
--namespace="Omni/Task" --status=open

Updated listTasks signature to accept all filter parameters and apply
them in sequence. Updated AGENTS.md with examples.

Closes task t-PpZGVf

0 files changed, 0 insertions, 0 deletions