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/commondir/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "commondir",
+  "version": "1.0.1",
+  "description": "compute the closest common parent for file paths",
+  "main": "index.js",
+  "dependencies": {},
+  "devDependencies": {
+    "tape": "^3.5.0"
+  },
+  "scripts": {
+    "test": "tape test/*.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/substack/node-commondir.git"
+  },
+  "keywords": [
+    "common",
+    "path",
+    "directory",
+    "file",
+    "parent",
+    "root"
+  ],
+  "author": {
+    "name": "James Halliday",
+    "email": "mail@substack.net",
+    "url": "http://substack.net"
+  },
+  "license": "MIT",
+  "engine": {
+    "node": ">=0.4"
+  }
+}