fix: feat: RESOURCES.md — infrastructure manifest for planner resource awareness (#23)

- Add RESOURCES.example.md: committed template showing Compute/Domains/Accounts/Budget structure
- Gitignore RESOURCES.md so local infrastructure data is never committed
- Planner phase 2 reads RESOURCES.md from factory root when present
- Planner prompt instructs Claude to reference specific resource aliases in operational issues

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

.gitignore

@@ -1,6 +1,9 @@
 # Secrets
 .env
 
+# Infrastructure manifest (local only — commit RESOURCES.example.md instead)
+RESOURCES.md
+
 # Runtime state
 *.log
 *.log.*