test: add vitest for unit tests (#50)

* feat: add vitest for unit tests

* chore: address pull request feedback

* test: add unit test code quality workflow

packages/common/src/test/object.spec.ts

@@ -0,0 +1,10 @@
+import { describe, expect, it } from "vitest";
+
+import { objectKeys } from "../object";
+
+describe("objectKeys should return all keys of an object", () => {
+  it("should return all keys of an object", () => {
+    const obj = { a: 1, b: 2, c: 3 };
+    expect(objectKeys(obj)).toEqual(["a", "b", "c"]);
+  });
+});