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/webpack/lib/NullFactory.js

@@ -0,0 +1,24 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const ModuleFactory = require("./ModuleFactory");
+
+/** @typedef {import("./ModuleFactory").ModuleFactoryCallback} ModuleFactoryCallback */
+/** @typedef {import("./ModuleFactory").ModuleFactoryCreateData} ModuleFactoryCreateData */
+
+class NullFactory extends ModuleFactory {
+	/**
+	 * @param {ModuleFactoryCreateData} data data object
+	 * @param {ModuleFactoryCallback} callback callback
+	 * @returns {void}
+	 */
+	create(data, callback) {
+		return callback();
+	}
+}
+
+module.exports = NullFactory;