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/react-router/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "react-router",
+  "version": "6.30.1",
+  "description": "Declarative routing for React",
+  "keywords": [
+    "react",
+    "router",
+    "route",
+    "routing",
+    "history",
+    "link"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/remix-run/react-router",
+    "directory": "packages/react-router"
+  },
+  "license": "MIT",
+  "author": "Remix Software <hello@remix.run>",
+  "sideEffects": false,
+  "main": "./dist/main.js",
+  "unpkg": "./dist/umd/react-router.production.min.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "dependencies": {
+    "@remix-run/router": "1.23.0"
+  },
+  "devDependencies": {
+    "react": "^18.2.0",
+    "react-router-dom": "6.30.1"
+  },
+  "peerDependencies": {
+    "react": ">=16.8"
+  },
+  "files": [
+    "dist/",
+    "CHANGELOG.md",
+    "LICENSE.md",
+    "README.md"
+  ],
+  "engines": {
+    "node": ">=14.0.0"
+  }
+}