chore: align .planning structure with conductor repo

- Add .planning/inspiration/ and .planning/testing/ directories
- Update .gitignore to ignore .planning/todos/ and .planning/testing/
- Remove .planning/todos/ from tracking

Public .planning/ directories remain tracked:
- standards/ (contributor guidelines)
- strategy/ (architecture vision)
- inspiration/ (reference material)

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

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

Author: maycotte

.gitignore

@@ -24,8 +24,8 @@ build/
 *~
 
 # Local planning and notes (not committed)
-.planning/todos/  # Personal task lists stay local
-.planning/todos/*
+.planning/todos/       # All todos stay local (WIP, complete, everything)
+.planning/testing/     # Internal testing notes
 .local/
 .dev-notes/