chore: configure vitest with jsdom and layer aliases

src/test/setup.ts

@@ -0,0 +1 @@
+import '@testing-library/jest-dom'

vitest.config.ts

@@ -0,0 +1,21 @@
+import { defineConfig } from 'vitest/config'
+import react from '@vitejs/plugin-react'
+import path from 'path'
+
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    environment: 'jsdom',
+    globals: true,
+    setupFiles: ['./src/test/setup.ts'],
+  },
+  resolve: {
+    alias: {
+      '$shared': path.resolve(__dirname, './src/shared'),
+      '$entities': path.resolve(__dirname, './src/entities'),
+      '$widgets': path.resolve(__dirname, './src/widgets'),
+      '$features': path.resolve(__dirname, './src/features'),
+      '$app': path.resolve(__dirname, './src/app'),
+    },
+  },
+})