test: migrate to Rstest (#21)

Author: chenjiahan

package.json

@@ -21,7 +21,8 @@
     "lint": "biome check .",
     "lint:write": "biome check . --write",
     "prepare": "simple-git-hooks && npm run build",
-    "test": "vitest",
+    "test": "rstest run",
+    "test:watch": "rstest",
     "bump": "npx bumpp"
   },
   "simple-git-hooks": {
@@ -35,11 +36,11 @@
   "devDependencies": {
     "@biomejs/biome": "^1.9.4",
     "@rslib/core": "^0.9.1",
+    "@rstest/core": "https://pkg.pr.new/web-infra-dev/rstest/@rstest/core@1b40438",
     "@types/node": "^22.15.29",
     "nano-staged": "^0.8.0",
     "simple-git-hooks": "^2.13.0",
-    "typescript": "^5.8.3",
-    "vitest": "^3.1.4"
+    "typescript": "^5.8.3"
   },
   "packageManager": "pnpm@10.11.0",
   "publishConfig": {