Reference: https://developer.mozilla.org/en-US/docs/Web/CSS/border-style
Related to: #37339

What problem does this address?

Currently it is possible to set solid, dashed, or dotted in border-style property.

What is your proposed solution?

Possibility to set more variations in border-style property. Examples: double, groove.

Please confirm that you have searched existing issues in the repo.

Yes