test: migrate to Rstest (#43)

Author: chenjiahan

package.json

@@ -28,7 +28,7 @@
     "lint": "biome check .",
     "lint:write": "biome check . --write",
     "prepare": "simple-git-hooks && npm run build",
-    "test": "node test/index.js",
+    "test": "rstest run",
     "bump": "npx bumpp"
   },
   "simple-git-hooks": {
@@ -44,6 +44,7 @@
     "@clack/prompts": "^0.11.0",
     "@microsoft/api-extractor": "^7.52.8",
     "@rslib/core": "0.9.1",
+    "@rstest/core": "https://pkg.pr.new/web-infra-dev/rstest/@rstest/core@1b40438",
     "@types/minimist": "^1.2.5",
     "@types/node": "22.15.29",
     "deepmerge": "^4.3.1",