feat: support default initial index in useStateList , update tests and update docs

[shifluxxc]

Description

Fixes : #2637 This PR adds support for initializing the useStateList hook with a default index addressing the issue #2637 . You can now pass a second argument to useStateList to specify the initial index, e.g. useStateList(['a', 'b', 'c'], 1) will start at 'b'.
The test suite has been updated to cover this new behavior and ensure backward compatibility.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as before)

Checklist

• [x] Read the Contributing Guide
• [x] Perform a code self-review
• [x] Comment the code, particularly in hard-to-understand areas
• [x] Add documentation
• [ ] Add hook's story at Storybook
• [x] Cover changes with tests
• [x] Ensure the test suite passes (yarn test)
• [x] Provide 100% tests coverage
• [ ] Make sure code lints (yarn lint). Fix it with yarn lint:fix in case of failure.
• [x] Make sure types are fine (yarn lint:types).