Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/postcss-js/process-result.js

@@ -0,0 +1,11 @@
+let objectify = require('./objectifier')
+
+module.exports = function processResult(result) {
+  if (console && console.warn) {
+    result.warnings().forEach(warn => {
+      let source = warn.plugin || 'PostCSS'
+      console.warn(source + ': ' + warn.text)
+    })
+  }
+  return objectify(result.root)
+}