fix(dispatcher): rename Task→Agent in allowed-tools, workflow prose, and agent tools frontmatter

Fixes #3168

The Claude Code subagent dispatcher tool is named `Agent` (with `subagent_type`
parameter). The `Task*` namespace (TaskCreate, TaskList, TaskGet, TaskUpdate,
TaskOutput, TaskStop) is the separate task-tracker. GSD's commands, workflows,
and agents were partially migrated and still referenced `- Task` / `Task(` in
55 files, causing orchestrators to silently fall back to inline execution when
no `Task` tool appeared on their tool surface.

Changes:
- `commands/gsd/*.md` allowed-tools: replaced `- Task` with `- Agent` in 24
  files; removed duplicate `- Task` from autonomous.md (already had `- Agent`)
- `get-shit-done/workflows/*.md`: replaced dispatcher `Task(` → `Agent(` in
  29 workflow files (~133 call sites); TaskCreate/List/Get/Update/Output/Stop
  left untouched
- `agents/gsd-debug-session-manager.md`: replaced `Task` → `Agent` in tools
  frontmatter (the only remaining agent with the wrong name)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

commands/gsd/map-codebase.md

@@ -8,7 +8,7 @@ allowed-tools:
   - Glob
   - Grep
   - Write
-  - Task
+  - Agent
 ---
 
 <objective>