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/get-own-enumerable-property-symbols/lib/index.d.ts

@@ -0,0 +1,2 @@
+declare const _default: (object: object) => symbol[];
+export default _default;

node_modules/get-own-enumerable-property-symbols/lib/index.js

@@ -0,0 +1,6 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = (object) => Object
+    .getOwnPropertySymbols(object)
+    .filter((keySymbol) => Object.prototype.propertyIsEnumerable.call(object, keySymbol));
+//# sourceMappingURL=index.js.map

node_modules/get-own-enumerable-property-symbols/lib/index.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;AAAA,kBAAe,CAAC,MAAc,EAAY,EAAE,CAAC,MAAM;KAChD,qBAAqB,CAAC,MAAM,CAAC;KAC7B,MAAM,CAAC,CAAC,SAAS,EAAW,EAAE,CAAC,MAAM,CAAC,SAAS,CAAC,oBAAoB,CAAC,IAAI,CAAC,MAAM,EAAE,SAAS,CAAC,CAAC,CAAA"}