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/tsconfig-paths/lib/__tests__/data/match-path-data.d.ts

@@ -0,0 +1,17 @@
+export interface OneTest {
+    readonly name: string;
+    readonly only?: boolean;
+    readonly skip?: boolean;
+    readonly absoluteBaseUrl: string;
+    readonly paths: {
+        [key: string]: Array<string>;
+    };
+    readonly mainFields?: string[];
+    readonly addMatchAll?: boolean;
+    readonly existingFiles: ReadonlyArray<string>;
+    readonly requestedModule: string;
+    readonly extensions: ReadonlyArray<string>;
+    readonly packageJson?: {};
+    readonly expectedPath: string | undefined;
+}
+export declare const tests: ReadonlyArray<OneTest>;