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/cjs/nip39.js

@@ -0,0 +1,42 @@
+"use strict";
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+
+// nip39.ts
+var nip39_exports = {};
+__export(nip39_exports, {
+  useFetchImplementation: () => useFetchImplementation,
+  validateGithub: () => validateGithub
+});
+module.exports = __toCommonJS(nip39_exports);
+var _fetch;
+try {
+  _fetch = fetch;
+} catch {
+}
+function useFetchImplementation(fetchImplementation) {
+  _fetch = fetchImplementation;
+}
+async function validateGithub(pubkey, username, proof) {
+  try {
+    let res = await (await _fetch(`https://gist.github.com/${username}/${proof}/raw`)).text();
+    return res === `Verifying that I control the following Nostr public key: ${pubkey}`;
+  } catch (_) {
+    return false;
+  }
+}