feat: add jest config type to default jest config

Author: allohamora

src/categories/js/jest/config/default.config.ts

@@ -9,6 +9,7 @@ export const scripts: NpmScript[] = [
 ];
 
 const configFileContent = readableMultilineString`
+  /** @type {import('jest').Config} */
   module.exports = {
     testEnvironment: 'node',
     testRegex: '.*\\.(spec|test)\\.js$',