chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/tests/setup.ts

@@ -0,0 +1,9 @@
+/**
+ * Vitest setup file
+ * This file is loaded before all tests
+ */
+
+import { beforeAll, afterAll } from 'vitest'
+
+// Global setup can be added here if needed
+// For now, we keep it minimal as each test suite has its own setup