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/lucide-react/dist/esm/icons/folder-key.mjs

@@ -0,0 +1,21 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const FolderKey = createLucideIcon("FolderKey", [
+  [
+    "path",
+    {
+      d: "M10 20H4a2 2 0 0 1-2-2V5c0-1.1.9-2 2-2h3.93a2 2 0 0 1 1.66.9l.82 1.2a2 2 0 0 0 1.66.9H20a2 2 0 0 1 2 2v2",
+      key: "203odn"
+    }
+  ],
+  ["circle", { cx: "16", cy: "20", r: "2", key: "1vifvg" }],
+  ["path", { d: "m22 14-4.5 4.5", key: "1ef6z8" }],
+  ["path", { d: "m21 15 1 1", key: "1ejcpy" }]
+]);
+
+export { FolderKey as default };
+//# sourceMappingURL=folder-key.mjs.map