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/array-includes/index.js

@@ -0,0 +1,27 @@
+'use strict';
+
+var define = require('define-properties');
+var RequireObjectCoercible = require('es-object-atoms/RequireObjectCoercible');
+var callBind = require('call-bind');
+var callBound = require('call-bound');
+
+var implementation = require('./implementation');
+var getPolyfill = require('./polyfill');
+var polyfill = callBind.apply(getPolyfill());
+var shim = require('./shim');
+
+var $slice = callBound('Array.prototype.slice');
+
+/* eslint-disable no-unused-vars */
+var boundShim = function includes(array, searchElement) {
+/* eslint-enable no-unused-vars */
+	RequireObjectCoercible(array);
+	return polyfill(array, $slice(arguments, 1));
+};
+define(boundShim, {
+	getPolyfill: getPolyfill,
+	implementation: implementation,
+	shim: shim
+});
+
+module.exports = boundShim;