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/object-is/test/index.js

@@ -0,0 +1,12 @@
+'use strict';
+
+var index = require('../');
+var test = require('tape');
+
+var runTests = require('./tests');
+
+test('as a function', function (t) {
+	runTests(index, t);
+
+	t.end();
+});