CSS: Proposal to add a border utility

[louismaximepiton]

Description

Add .border-black.

Motivation & Context

We have .text-black and .text-white. We have .bg-black and .bg-white.
Just felt weird having .border-white and no .border-black. Maybe the .border-white could be removed instead of adding the black one ?

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• https://deploy-preview-37905--twbs-bootstrap.netlify.app/docs/5.3/utilities/borders#color

Related issues

NA

[mdo]

I dig, thanks!