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/settings/index.ts

@@ -0,0 +1,6 @@
+export { SettingsNav } from './SettingsNav'
+export { SettingsSection } from './SettingsSection'
+export { SettingToggle } from './SettingToggle'
+export { SettingSelect } from './SettingSelect'
+export { SettingInput } from './SettingInput'
+export { SettingsSearch } from './SettingsSearch'