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/flip-vertical-2.mjs

@@ -0,0 +1,17 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const FlipVertical2 = createLucideIcon("FlipVertical2", [
+  ["path", { d: "m17 3-5 5-5-5h10", key: "1ftt6x" }],
+  ["path", { d: "m17 21-5-5-5 5h10", key: "1m0wmu" }],
+  ["path", { d: "M4 12H2", key: "rhcxmi" }],
+  ["path", { d: "M10 12H8", key: "s88cx1" }],
+  ["path", { d: "M16 12h-2", key: "10asgb" }],
+  ["path", { d: "M22 12h-2", key: "14jgyd" }]
+]);
+
+export { FlipVertical2 as default };
+//# sourceMappingURL=flip-vertical-2.mjs.map