Add type declarations and improve test typings

Introduces src/types.d.ts and test/types.d.ts for Cloudflare Workers and test utilities. Enhances JSDoc comments and type annotations across test files for better type safety and clarity. Updates tsconfig.json to use bundler module resolution and include additional type sources. Minor test logic and assertion improvements for robustness.

test/platforms/cran.test.js

@@ -37,7 +37,7 @@ describe('CRAN Platform Configuration', () => {
 
     testCases.forEach(({ input, expected, description }) => {
       const result = transformPath(input, 'cran');
-      expect(result).toBe(expected, `Failed for ${description}: ${input}`);
+      expect(result, `Failed for ${description}: ${input}`).toBe(expected);
     });
   });