feat: use vitest controlled api-snapshot

test/__snapshots__/tsnapi/pkg-placeholder/index.snapshot.d.ts

@@ -0,0 +1,7 @@
+/**
+ * Generated by tsnapi — public API snapshot of `pkg-placeholder`
+ */
+// #region Variables
+export declare const one: number;
+export declare const two: number;
+// #endregion

test/__snapshots__/tsnapi/pkg-placeholder/index.snapshot.js

@@ -0,0 +1,7 @@
+/**
+ * Generated by tsnapi — public API snapshot of `pkg-placeholder`
+ */
+// #region Variables
+export var one /* const */
+export var two /* const */
+// #endregion