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/components/session-provider-wrapper.tsx

@@ -0,0 +1,7 @@
+'use client'
+
+import { SessionProvider } from 'next-auth/react'
+
+export function SessionProviderWrapper({ children }: { children: React.ReactNode }) {
+  return <SessionProvider>{children}</SessionProvider>
+}