[2.10.2] Rename workflow commands to ce: prefix

- /compound:plan → /ce:plan
- /compound:review → /ce:review
- /compound:work → /ce:work
- /compound:codify → /ce:compound

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/compound-engineering/commands/workflows/plan.md

@@ -1,5 +1,5 @@
 ---
-name: compound:plan
+name: ce:plan
 description: Transform feature descriptions into well-structured project plans following conventions
 argument-hint: "[feature description, bug report, or improvement idea]"
 ---