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/FalseIIFEUmdWarning.js

@@ -0,0 +1,19 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Arka Pratim Chaudhuri @arkapratimc
+*/
+
+"use strict";
+
+const WebpackError = require("./WebpackError");
+
+class FalseIIFEUmdWarning extends WebpackError {
+	constructor() {
+		super();
+		this.name = "FalseIIFEUmdWarning";
+		this.message =
+			"Configuration:\nSetting 'output.iife' to 'false' is incompatible with 'output.library.type' set to 'umd'. This configuration may cause unexpected behavior, as UMD libraries are expected to use an IIFE (Immediately Invoked Function Expression) to support various module formats. Consider setting 'output.iife' to 'true' or choosing a different 'library.type' to ensure compatibility.\nLearn more: https://webpack.js.org/configuration/output/";
+	}
+}
+
+module.exports = FalseIIFEUmdWarning;