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/graphemer/lib/GraphemerIterator.js

@@ -0,0 +1,36 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+/**
+ * GraphemerIterator
+ *
+ * Takes a string and a "BreakHandler" method during initialisation
+ * and creates an iterable object that returns individual graphemes.
+ *
+ * @param str {string}
+ * @return GraphemerIterator
+ */
+class GraphemerIterator {
+    constructor(str, nextBreak) {
+        this._index = 0;
+        this._str = str;
+        this._nextBreak = nextBreak;
+    }
+    [Symbol.iterator]() {
+        return this;
+    }
+    next() {
+        let brk;
+        if ((brk = this._nextBreak(this._str, this._index)) < this._str.length) {
+            const value = this._str.slice(this._index, brk);
+            this._index = brk;
+            return { value: value, done: false };
+        }
+        if (this._index < this._str.length) {
+            const value = this._str.slice(this._index);
+            this._index = this._str.length;
+            return { value: value, done: false };
+        }
+        return { value: undefined, done: true };
+    }
+}
+exports.default = GraphemerIterator;