fix(plan): remove deprecated /technical_review references

The /technical_review command was removed in v2.32.0 but references
remained in ce:plan and deepen-plan menus. Remove them entirely -
the existing 'Review and refine' option (document-review) already
covers plan review.

Fixes #244

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

plugins/compound-engineering/skills/deepen-plan/SKILL.md

@@ -480,14 +480,12 @@ After writing the enhanced plan, use the **AskUserQuestion tool** to present the
 
 **Options:**
 1. **View diff** - Show what was added/changed
-2. **Run `/technical_review`** - Get feedback from reviewers on enhanced plan
-3. **Start `/ce:work`** - Begin implementing this enhanced plan
-4. **Deepen further** - Run another round of research on specific sections
-5. **Revert** - Restore original plan (if backup exists)
+2. **Start `/ce:work`** - Begin implementing this enhanced plan
+3. **Deepen further** - Run another round of research on specific sections
+4. **Revert** - Restore original plan (if backup exists)
 
 Based on selection:
 - **View diff** → Run `git diff [plan_path]` or show before/after
-- **`/technical_review`** → Call the /technical_review command with the plan file path
 - **`/ce:work`** → Call the /ce:work command with the plan file path
 - **Deepen further** → Ask which sections need more research, then re-run those agents
 - **Revert** → Restore from git or backup