Add Unit Tests for useFocusVisible Hook

[manish3299]

Add Unit Tests for useFocusVisible Hook

Description:
Write unit tests for the useFocusVisible hook using React Testing Library.
Verify that:

• The hook returns true when navigating with a keyboard.
• The hook returns false when using a mouse.

Steps:

1. Setup your test environment if you haven’t already.
2. Create tests in a new file src/hooks/useFocusVisible.test.js.
3. Mock events (keyboard vs. mouse) to test the hook behavior.
4. Ensure the tests pass using npm run test.

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