feat: use vitest controlled api-snapshot

test/api-snapshot.test.ts

@@ -0,0 +1,14 @@
+import { fileURLToPath } from 'node:url'
+import { guardStaleBuild } from 'tsdown-stale-guard'
+import { snapshotApiPerEntry } from 'tsnapi/vitest'
+import { beforeAll, describe } from 'vitest'
+
+const root = fileURLToPath(new URL('..', import.meta.url))
+
+describe('api snapshot', () => {
+  beforeAll(async () => {
+    await guardStaleBuild({ root })
+  })
+
+  snapshotApiPerEntry(root)
+})