test(frontend): setup environment for controlled integration tests with redux

[amanape]

This PR introduces a structured setup for testing React components, enabling controlled manipulation of Redux state for various edge case and scenario testing.

I have:

• Moved frontend/src/setupTests.ts to frontend/vitest.setup.ts and made the appropriate tsconfig.ts changes for ESLint.
• Created a test-utils.tsx file in the root directory that contains the render function that allows for testing with Redux
• Created the Browser.test.tsx components that uses the new tools to demonstrate how we can test components