Move vitest.config.ts to root folder

Author: amakarudze

tests/components/carousel.unit.test.ts

@@ -1,15 +1,14 @@
-import { JSDOM } from 'jsdom';
 import { describe, it, expect } from 'vitest';
 
 describe('Carousel component (unit)', () => {
   it('renders slides', () => {
-    const dom = new JSDOM(`
+    document.body.innerHTML = `
       <div class="swiper">
         <div class="swiper-slide">A</div>
         <div class="swiper-slide">B</div>
       </div>
-    `);
-    const slides = dom.window.document.querySelectorAll('.swiper-slide');
+    `;
+    const slides = document.querySelectorAll('.swiper-slide');
     expect(slides.length).toBe(2);
   });
-});
+});