Should be able to change the link color on a bread crumb block

[EvanPalmer]

Is your feature request related to a problem? Please describe.
When you create a breadcrumb block, the user can't select the color for the links, so they're left as being the default color (blue).

Describe the solution you'd like
Would be good to have a color picker for the text links in the block styling tab.

Describe alternatives you've considered
Override default link color globally? Not sure if that's the right thing to do here?

Additional context
I think it should look like this:

[EvanPalmer]

@daniel-isaacs What do you think? I have code ready to add this.