Preformatted block: Add color controls.

[juanfra]

Description

Add color controls for the preformatted block. When the block is using background, I'm adding some padding. Fixes #28098

How has this been tested?

Tested using the block and changing colors while using twentytwentyone.

Screenshots

Types of changes

New feature (non-breaking change which adds functionality).

Checklist:

• My code is tested.
• [ x] My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[paaljoachim]

Hi @juanfra Juan

Let us know how we can help.

[juanfra]

Hi @paaljoachim!

Thanks for looking into this, I fixed the merge conflict. This is ready to be reviewed.

[paaljoachim]

Hi @juanfra Juan

Perhaps after this PR has been merged that you can continue with:
File Block: Add background/text color support
#18989

Thank you for your help in adding these controls!

[juanfra]

@paaljoachim sure! will try to find some time for that in the upcoming days.

[gwwar]

This tests well for me. Thanks for the contribution @juanfra !

[paaljoachim]

Hi @juanfra Juan

We need to make a correction to the File block I linked to. It needs Color and Typography controls (not only color controls). Just like the Buttons block here needs Color and Typography controls. #29112

Thank you!