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/json-buffer/index.js

@@ -0,0 +1,58 @@
+//TODO: handle reviver/dehydrate function like normal
+//and handle indentation, like normal.
+//if anyone needs this... please send pull request.
+
+exports.stringify = function stringify (o) {
+  if('undefined' == typeof o) return o
+
+  if(o && Buffer.isBuffer(o))
+    return JSON.stringify(':base64:' + o.toString('base64'))
+
+  if(o && o.toJSON)
+    o =  o.toJSON()
+
+  if(o && 'object' === typeof o) {
+    var s = ''
+    var array = Array.isArray(o)
+    s = array ? '[' : '{'
+    var first = true
+
+    for(var k in o) {
+      var ignore = 'function' == typeof o[k] || (!array && 'undefined' === typeof o[k])
+      if(Object.hasOwnProperty.call(o, k) && !ignore) {
+        if(!first)
+          s += ','
+        first = false
+        if (array) {
+          if(o[k] == undefined)
+            s += 'null'
+          else
+            s += stringify(o[k])
+        } else if (o[k] !== void(0)) {
+          s += stringify(k) + ':' + stringify(o[k])
+        }
+      }
+    }
+
+    s += array ? ']' : '}'
+
+    return s
+  } else if ('string' === typeof o) {
+    return JSON.stringify(/^:/.test(o) ? ':' + o : o)
+  } else if ('undefined' === typeof o) {
+    return 'null';
+  } else
+    return JSON.stringify(o)
+}
+
+exports.parse = function (s) {
+  return JSON.parse(s, function (key, value) {
+    if('string' === typeof value) {
+      if(/^:base64:/.test(value))
+        return Buffer.from(value.substring(8), 'base64')
+      else
+        return /^:/.test(value) ? value.substring(1) : value 
+    }
+    return value
+  })
+}