Initial commit: demo todo CLI with Claude Code setup

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,7 @@
+node_modules/
+todos.json
+.DS_Store
+
+# Personal Claude Code overrides (not shared)
+.claude/settings.local.json
+CLAUDE.local.md