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)/settings/ai/page.tsx

@@ -0,0 +1,22 @@
+import { auth } from '@/auth'
+import { redirect } from 'next/navigation'
+import { AISettingsPanel } from '@/components/ai/ai-settings-panel'
+import { getAISettings } from '@/app/actions/ai-settings'
+import { AISettingsHeader } from './ai-settings-header'
+
+export default async function AISettingsPage() {
+  const session = await auth()
+
+  if (!session?.user) {
+    redirect('/api/auth/signin')
+  }
+
+  const settings = await getAISettings()
+
+  return (
+    <div className="space-y-6">
+      <AISettingsHeader />
+      <AISettingsPanel initialSettings={settings} />
+    </div>
+  )
+}