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

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

Checklist

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