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/data.js

@@ -0,0 +1,49 @@
+'use strict';
+
+var KEYWORDS = [
+  'multipleOf',
+  'maximum',
+  'exclusiveMaximum',
+  'minimum',
+  'exclusiveMinimum',
+  'maxLength',
+  'minLength',
+  'pattern',
+  'additionalItems',
+  'maxItems',
+  'minItems',
+  'uniqueItems',
+  'maxProperties',
+  'minProperties',
+  'required',
+  'additionalProperties',
+  'enum',
+  'format',
+  'const'
+];
+
+module.exports = function (metaSchema, keywordsJsonPointers) {
+  for (var i=0; i<keywordsJsonPointers.length; i++) {
+    metaSchema = JSON.parse(JSON.stringify(metaSchema));
+    var segments = keywordsJsonPointers[i].split('/');
+    var keywords = metaSchema;
+    var j;
+    for (j=1; j<segments.length; j++)
+      keywords = keywords[segments[j]];
+
+    for (j=0; j<KEYWORDS.length; j++) {
+      var key = KEYWORDS[j];
+      var schema = keywords[key];
+      if (schema) {
+        keywords[key] = {
+          anyOf: [
+            schema,
+            { $ref: 'https://raw.githubusercontent.com/ajv-validator/ajv/master/lib/refs/data.json#' }
+          ]
+        };
+      }
+    }
+  }
+
+  return metaSchema;
+};