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/app/(main)/archive/page.tsx

@@ -0,0 +1,16 @@
+import { getArchivedNotes } from '@/app/actions/notes'
+import { MasonryGrid } from '@/components/masonry-grid'
+import { ArchiveHeader } from '@/components/archive-header'
+
+export const dynamic = 'force-dynamic'
+
+export default async function ArchivePage() {
+  const notes = await getArchivedNotes()
+
+  return (
+    <main className="container mx-auto px-4 py-8 max-w-7xl">
+      <ArchiveHeader />
+      <MasonryGrid notes={notes} />
+    </main>
+  )
+}