refactor: move project to frontend directory

frontend/vitest.config.ts

@@ -0,0 +1,14 @@
+import {fileURLToPath} from 'node:url';
+import {configDefaults, defineConfig, mergeConfig} from 'vitest/config';
+import viteConfig from './vite.config';
+
+export default mergeConfig(
+  viteConfig,
+  defineConfig({
+    test: {
+      environment: 'jsdom',
+      exclude: [...configDefaults.exclude, 'e2e/*'],
+      root: fileURLToPath(new URL('./', import.meta.url)),
+    },
+  }),
+);