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/fs-extra/lib/remove/index.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const u = require('universalify').fromCallback
+const rimraf = require('./rimraf')
+
+function remove (path, callback) {
+  // Node 14.14.0+
+  if (fs.rm) return fs.rm(path, { recursive: true, force: true }, callback)
+  rimraf(path, callback)
+}
+
+function removeSync (path) {
+  // Node 14.14.0+
+  if (fs.rmSync) return fs.rmSync(path, { recursive: true, force: true })
+  rimraf.sync(path)
+}
+
+module.exports = {
+  remove: u(remove),
+  removeSync
+}