updated/moved vitest, finished merge

app/__test__/vitest/base.vi-test.ts

@@ -0,0 +1,12 @@
+import { describe, it, expect } from "vitest";
+
+describe("Example Test Suite", () => {
+   it("should pass basic arithmetic", () => {
+      expect(1 + 1).toBe(2);
+   });
+
+   it("should handle async operations", async () => {
+      const result = await Promise.resolve(42);
+      expect(result).toBe(42);
+   });
+});