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/es-abstract/2024/InstallErrorCause.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+var isObject = require('es-object-atoms/isObject');
+
+var CreateNonEnumerableDataPropertyOrThrow = require('./CreateNonEnumerableDataPropertyOrThrow');
+var Get = require('./Get');
+var HasProperty = require('./HasProperty');
+
+// https://262.ecma-international.org/13.0/#sec-installerrorcause
+
+module.exports = function InstallErrorCause(O, options) {
+	if (!isObject(O)) {
+		throw new $TypeError('Assertion failed: Type(O) is not Object');
+	}
+
+	if (isObject(options) && HasProperty(options, 'cause')) {
+		var cause = Get(options, 'cause');
+		CreateNonEnumerableDataPropertyOrThrow(O, 'cause', cause);
+	}
+};