fix: checkbox accessibility

[jsomsanith-tlnd]

What is the problem this PR is trying to solve?
Checkbox component is not accessible

1. non focusable and ignored by SR because of visibility: hidden
2. label is not required
3. errors are set as labels
4. checkbox with errors are not set as invalid
5. missing focus visual aspect for keyboard navigation

What is the chosen solution to this problem?

1. make input visible again, but outside of viewport
2. label is required, introducing hideLabel props. Be careful to give a clear context when you hide the label in the designs
3. errors are in a div next to the label, associated with input via aria-describedby
4. use aria-invalid on input when there is an error
5. TODO

[domyen]

Thanks, I'll work on 5 tomorrow and commit updates to this branch 👍

[kylesuss]

🚀 PR was released in v0.0.26 🚀