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/key-round.mjs

@@ -0,0 +1,19 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const KeyRound = createLucideIcon("KeyRound", [
+  [
+    "path",
+    {
+      d: "M2 18v3c0 .6.4 1 1 1h4v-3h3v-3h2l1.4-1.4a6.5 6.5 0 1 0-4-4Z",
+      key: "167ctg"
+    }
+  ],
+  ["circle", { cx: "16.5", cy: "7.5", r: ".5", key: "1kog09" }]
+]);
+
+export { KeyRound as default };
+//# sourceMappingURL=key-round.mjs.map