docs: Add versioning requirements for plugin development

- Add CLAUDE.md with versioning checklist and pre-commit requirements
- Add docs/solutions/plugin-versioning-requirements.md with detailed workflow
- Bump version to 2.0.1
- Update CHANGELOG with v2.0.1 entry

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

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

plugins/compounding-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "compounding-engineering",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "AI-powered development tools. 24 agents (organized by category: review, research, design, workflow, docs), 15 commands, 11 skills for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",