clean: remove .pi/ config from calvana repo — lives in pi-vs-claude-code now

- Removed all .pi/ (agents, themes, extensions, skills, observatory)
- Removed CLAUDE.md (belongs in parent pi repo)
- Added .pi/ and CLAUDE.md to .gitignore
- Added .pi/ to pledge-now-pay-later/.gitignore

pledge-now-pay-later/.gitignore

@@ -41,3 +41,4 @@ next-env.d.ts
 # SQLite dev database
 *.db
 *.db-journal
+.pi/