chore: remove CLAUDE.md from tracking (local dev file)

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

Author: pfillion42

.gitignore

@@ -35,3 +35,4 @@ npm-debug.log*
 # Project-specific (local only)
 PLAN.md
 DEVLOG.md
+CLAUDE.md