feat: initialize markr nostr bookmark client

- Add project structure with TypeScript, React, and Vite
- Implement nostr authentication using browser extension (NIP-07)
- Add NIP-51 compliant bookmark fetching and display
- Create minimal UI with login and bookmark components
- Integrate applesauce-core and applesauce-react libraries
- Add responsive styling with dark/light mode support
- Include comprehensive README with setup instructions

This is a minimal MVP for a nostr bookmark client that allows users to
view their bookmarks according to NIP-51 specification.

node_modules/mdast-util-to-markdown/index.d.ts

@@ -0,0 +1,16 @@
+export type {
+  ConstructNameMap,
+  ConstructName,
+  Handle,
+  Handlers,
+  Info,
+  Join,
+  Map,
+  Options,
+  SafeConfig,
+  State,
+  Tracker,
+  Unsafe
+} from './lib/types.js'
+export {toMarkdown} from './lib/index.js'
+export {handle as defaultHandlers} from './lib/handle/index.js'