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/nostr-tools/lib/esm/nip11.js

@@ -0,0 +1,18 @@
+// nip11.ts
+var _fetch;
+try {
+  _fetch = fetch;
+} catch {
+}
+function useFetchImplementation(fetchImplementation) {
+  _fetch = fetchImplementation;
+}
+async function fetchRelayInformation(url) {
+  return await (await fetch(url.replace("ws://", "http://").replace("wss://", "https://"), {
+    headers: { Accept: "application/nostr+json" }
+  })).json();
+}
+export {
+  fetchRelayInformation,
+  useFetchImplementation
+};