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/webpack/schemas/plugins/optimize/AggressiveSplittingPlugin.json

@@ -0,0 +1,23 @@
+{
+  "title": "AggressiveSplittingPluginOptions",
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "chunkOverhead": {
+      "description": "Extra cost for each chunk (Default: 9.8kiB).",
+      "type": "number"
+    },
+    "entryChunkMultiplicator": {
+      "description": "Extra cost multiplicator for entry chunks (Default: 10).",
+      "type": "number"
+    },
+    "maxSize": {
+      "description": "Byte, max size of per file (Default: 50kiB).",
+      "type": "number"
+    },
+    "minSize": {
+      "description": "Byte, split point. (Default: 30kiB).",
+      "type": "number"
+    }
+  }
+}