refactor(workflow): remove all .active marker file references and sync documentation

Core Changes (10 files):
- commands: cli/execute.md, memory/docs.md, workflow/review.md, workflow/brainstorm/*.md
- agents: cli-execution-agent.md
- workflows: task-core.md, workflow-architecture.md

Transformations:
- Removed all .active-* marker file operations (touch/rm/find)
- Updated session discovery to directory-based (.workflow/sessions/)
- Updated directory structure examples to show sessions/ subdirectory
- Replaced marker-based state with location-based state

Reference Documentation (57 files):
- Auto-synced via analyze_commands.py script
- Includes all core file changes
- Updated command indexes (all-commands.json, by-category.json, etc.)

Migration complete: 100% .active marker references removed
Session state now determined by directory location only

.claude/skills/command-guide/reference/commands/workflow/test-fix-gen.md

@@ -513,7 +513,7 @@ If quality gate fails:
 
 ### Output Files Structure
 
-Created in `.workflow/WFS-test-[session]/`:
+Created in `.workflow/sessions/WFS-test-[session]/`:
 
 ```
 WFS-test-[session]/
@@ -579,7 +579,7 @@ Test-Fix-Gen Workflow Orchestrator (Dual-Mode Support)
    └─ Command ends, control returns to user
 
 Artifacts Created:
-├── .workflow/WFS-test-[session]/
+├── .workflow/sessions/WFS-test-[session]/
 │   ├── workflow-session.json
 │   ├── IMPL_PLAN.md
 │   ├── TODO_LIST.md