Move SvelteKit to subfolder

SvelteKit moved to subfolder for sake of compartimentalization.

packages/vite.config.js

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config';
+import { sveltekit } from '@sveltejs/kit/vite';
+
+export default defineConfig({
+	plugins: [sveltekit()],
+
+	test: {
+		include: ['src/**/*.{test,spec}.{js,ts}']
+	}
+});