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/2025/TimeClip.js

@@ -0,0 +1,20 @@
+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $Date = GetIntrinsic('%Date%');
+
+var $isFinite = require('math-intrinsics/isFinite');
+var abs = require('math-intrinsics/abs');
+
+var ToNumber = require('./ToNumber');
+
+// https://262.ecma-international.org/5.1/#sec-15.9.1.14
+
+module.exports = function TimeClip(time) {
+	if (!$isFinite(time) || abs(time) > 8.64e15) {
+		return NaN;
+	}
+	return +new $Date(ToNumber(time));
+};
+