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/browser-process-hrtime/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "browser-process-hrtime",
+  "version": "1.0.0",
+  "description": "Shim for process.hrtime in the browser",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/kumavis/browser-process-hrtime.git"
+  },
+  "author": "kumavis",
+  "license": "BSD-2-Clause"
+}