feat(package): add standard react template testing files

template/src/App.test.tsx

@@ -0,0 +1,9 @@
+import React from "react";
+import { render, screen } from "@testing-library/react";
+import App from "./App";
+
+test("renders learn react link", () => {
+	render(<App />);
+	const linkElement = screen.getByText(/learn react/i);
+	expect(linkElement).toBeInTheDocument();
+});

template/src/setupTests.ts

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import "@testing-library/jest-dom";