chore: initial project setup

vitest.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitest/config';
+import swc from 'unplugin-swc';
+
+export default defineConfig({
+  test: {
+    environment: 'node',
+    coverage: {
+      provider: 'istanbul',
+      reporter: ['text', 'html', 'json', 'lcov'],
+      include: ['**/src/**/*.ts'],
+      exclude: ['**/src/index.ts'],
+    },
+  },
+  plugins: [swc.vite()],
+});