build(kawruh-app): initialize react app dependencies and scripts

This commit populates the `package.json` for the `kawruh-app` with the standard configuration provided by Create React App.

It includes dependencies for React, testing-library, and web-vitals, along with the necessary scripts (`start`, `build`, `test`, `eject`) to manage the development lifecycle.

kawruh-app/src/setupTests.js

@@ -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';