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/heading-5.mjs

@@ -0,0 +1,22 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const Heading5 = createLucideIcon("Heading5", [
+  ["path", { d: "M4 12h8", key: "17cfdx" }],
+  ["path", { d: "M4 18V6", key: "1rz3zl" }],
+  ["path", { d: "M12 18V6", key: "zqpxq5" }],
+  ["path", { d: "M17 13v-3h4", key: "1nvgqp" }],
+  [
+    "path",
+    {
+      d: "M17 17.7c.4.2.8.3 1.3.3 1.5 0 2.7-1.1 2.7-2.5S19.8 13 18.3 13H17",
+      key: "2nebdn"
+    }
+  ]
+]);
+
+export { Heading5 as default };
+//# sourceMappingURL=heading-5.mjs.map