chore: initialize portfolio toolchain

vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vitest/config';
+import { fileURLToPath, URL } from 'node:url';
+
+export default defineConfig({
+  resolve: {
+    alias: { '@': fileURLToPath(new URL('./src', import.meta.url)) },
+  },
+  test: {
+    environment: 'happy-dom',
+    globals: false,
+    coverage: { include: ['src/**/*.{ts,vue}'] },
+  },
+});