Custom ARIA labels

[fdeters]

Suggested feature

A small suggestion: Can we add a property for setting the aria-label? Right now, there is no aria-label, only aria-valuetext.

Example

It could look like this:

<nb-skeleton
    label="Loading comments..."
></nb-skeleton>

Bonus improvement

Also, would it be better if a component like <nb-skeleton variant="row" count="30"></nb-skeleton> had a single set of ARIA labels rather than rendering 20 elements each with their own ARIA properties?

Example