Add repo CLAUDE.md to auto-run setup for new users

When users clone the repo and run `claude`, it now automatically
offers to run the setup script instead of requiring manual steps.

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

.gitignore

@@ -1,7 +1,8 @@
 # Personal therapy data (generated by setup)
+# Note: CLAUDE.md is NOT ignored here - we need it for repo setup instructions
+# The generated therapy folder has its own .gitignore
 profile.md
 sessions/
-CLAUDE.md
 
 # Environment files
 .env