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/rollup/dist/es/rollup.js

@@ -0,0 +1,16 @@
+/*
+  @license
+	Rollup.js v2.79.2
+	Thu, 26 Sep 2024 18:44:14 GMT - commit 48aef33cf2f2a6dfb175afb3bcd6a977c81f1d5c
+
+	https://github.com/rollup/rollup
+
+	Released under the MIT License.
+*/
+export { version as VERSION, defineConfig, rollup, watch } from './shared/rollup.js';
+import 'path';
+import 'process';
+import 'perf_hooks';
+import 'crypto';
+import 'fs';
+import 'events';