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/ajv/lib/compile/ucs2length.js

@@ -0,0 +1,20 @@
+'use strict';
+
+// https://mathiasbynens.be/notes/javascript-encoding
+// https://github.com/bestiejs/punycode.js - punycode.ucs2.decode
+module.exports = function ucs2length(str) {
+  var length = 0
+    , len = str.length
+    , pos = 0
+    , value;
+  while (pos < len) {
+    length++;
+    value = str.charCodeAt(pos++);
+    if (value >= 0xD800 && value <= 0xDBFF && pos < len) {
+      // high surrogate, and there is a next character
+      value = str.charCodeAt(pos);
+      if ((value & 0xFC00) == 0xDC00) pos++; // low surrogate
+    }
+  }
+  return length;
+};