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.mjs

@@ -0,0 +1,17 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const FlipVertical = createLucideIcon("FlipVertical", [
+  ["path", { d: "M21 8V5a2 2 0 0 0-2-2H5a2 2 0 0 0-2 2v3", key: "14bfxa" }],
+  ["path", { d: "M21 16v3a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-3", key: "14rx03" }],
+  ["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 { FlipVertical as default };
+//# sourceMappingURL=flip-vertical.mjs.map