[2.9.0] Rename plugin to compound-engineering

BREAKING: Plugin renamed from compounding-engineering to compound-engineering.
Users will need to reinstall with the new name:

  claude /plugin install compound-engineering

Changes:
- Renamed plugin directory and all references
- Updated documentation counts (24 agents, 19 commands)
- Added julik-frontend-races-reviewer to docs

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

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

plans/grow-your-own-garden-plugin-architecture.md

@@ -1,6 +1,6 @@
 # Grow Your Own Garden: Adaptive Agent Ecosystem
 
-> **Issue:** https://github.com/EveryInc/compounding-engineering-plugin/issues/20
+> **Issue:** https://github.com/EveryInc/compound-engineering-plugin/issues/20
 
 ## The Idea
 
@@ -58,7 +58,7 @@ plugin/agents/        → From installed plugins
 
 ### Phase 1: Split the Plugin
 - Create `agent-library/` with framework-specific agents (Rails, Python, TypeScript, Frontend)
-- Keep `compounding-engineering` as core with universal agents
+- Keep `compound-engineering` as core with universal agents
 - No breaking changes—existing users unaffected
 
 ### Phase 2: Agent Discovery