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/roller-coaster.mjs

@@ -0,0 +1,24 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const RollerCoaster = createLucideIcon("RollerCoaster", [
+  ["path", { d: "M6 19V5", key: "1r845m" }],
+  ["path", { d: "M10 19V6.8", key: "9j2tfs" }],
+  ["path", { d: "M14 19v-7.8", key: "10s8qv" }],
+  ["path", { d: "M18 5v4", key: "1tajlv" }],
+  ["path", { d: "M18 19v-6", key: "ielfq3" }],
+  ["path", { d: "M22 19V9", key: "158nzp" }],
+  [
+    "path",
+    {
+      d: "M2 19V9a4 4 0 0 1 4-4c2 0 4 1.33 6 4s4 4 6 4a4 4 0 1 0-3-6.65",
+      key: "1930oh"
+    }
+  ]
+]);
+
+export { RollerCoaster as default };
+//# sourceMappingURL=roller-coaster.mjs.map