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/ajv-formats/dist/index.d.ts

@@ -0,0 +1,15 @@
+import { FormatMode, FormatName } from "./formats";
+import type { Plugin, Format } from "ajv";
+export { FormatMode, FormatName } from "./formats";
+export { LimitFormatError } from "./limit";
+export interface FormatOptions {
+    mode?: FormatMode;
+    formats?: FormatName[];
+    keywords?: boolean;
+}
+export declare type FormatsPluginOptions = FormatName[] | FormatOptions;
+export interface FormatsPlugin extends Plugin<FormatsPluginOptions> {
+    get: (format: FormatName, mode?: FormatMode) => Format;
+}
+declare const formatsPlugin: FormatsPlugin;
+export default formatsPlugin;