Add vitest, add json validation tests, fix broken json files (#566)

frontend/src/__tests__/app/page.test.tsx

@@ -0,0 +1,11 @@
+import { screen } from "@testing-library/dom";
+import { render } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+import Page from "@/app/page";
+
+describe("Page", () => {
+  it("should show button to view scripts", () => {
+    render(<Page />);
+    expect(screen.getByRole("button", { name: "View Scripts" })).toBeDefined();
+  });
+});