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/stack-utils/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "stack-utils",
+  "version": "2.0.6",
+  "description": "Captures and cleans stack traces",
+  "license": "MIT",
+  "repository": "tapjs/stack-utils",
+  "author": {
+    "name": "James Talmage",
+    "email": "james@talmage.io",
+    "url": "github.com/jamestalmage"
+  },
+  "engines": {
+    "node": ">=10"
+  },
+  "scripts": {
+    "test": "tap",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "prepublishOnly": "git push origin --follow-tags"
+  },
+  "tap": {
+    "check-coverage": true
+  },
+  "files": [
+    "index.js"
+  ],
+  "dependencies": {
+    "escape-string-regexp": "^2.0.0"
+  },
+  "devDependencies": {
+    "bluebird": "^3.7.2",
+    "coveralls": "^3.0.9",
+    "nested-error-stacks": "^2.1.0",
+    "pify": "^4.0.1",
+    "q": "^1.5.1",
+    "source-map-support": "^0.5.20",
+    "tap": "^16.3.0"
+  }
+}