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/appearance/page.tsx

@@ -0,0 +1,26 @@
+import { auth } from '@/auth'
+import { redirect } from 'next/navigation'
+import { getAISettings } from '@/app/actions/ai-settings'
+import { getUserSettings } from '@/app/actions/user-settings'
+import { AppearanceSettingsClient } from './appearance-settings-client'
+
+export default async function AppearanceSettingsPage() {
+  const session = await auth()
+  if (!session?.user) {
+    redirect('/api/auth/signin')
+  }
+
+  const [aiSettings, userSettings] = await Promise.all([
+    getAISettings(),
+    getUserSettings()
+  ])
+
+  return (
+    <AppearanceSettingsClient
+      initialFontSize={aiSettings.fontSize}
+      initialTheme={userSettings.theme}
+      initialNotesViewMode={aiSettings.notesViewMode === 'masonry' ? 'masonry' : 'tabs'}
+      initialCardSizeMode={userSettings.cardSizeMode}
+    />
+  )
+}