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/CodeGenerationError.js

@@ -0,0 +1,29 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const WebpackError = require("./WebpackError");
+
+/** @typedef {import("./Module")} Module */
+
+class CodeGenerationError extends WebpackError {
+	/**
+	 * Create a new CodeGenerationError
+	 * @param {Module} module related module
+	 * @param {Error} error Original error
+	 */
+	constructor(module, error) {
+		super();
+
+		this.name = "CodeGenerationError";
+		this.error = error;
+		this.message = error.message;
+		this.details = error.stack;
+		this.module = module;
+	}
+}
+
+module.exports = CodeGenerationError;