Make UI Kit sections data-driven and let modules add their components with ui_kit.yml

Aaron Christianrequested to merge
issue/bootstrap_ui_kit-3622922:3622922-migrate-icons-to into 2.x

Make the Color and Typography sections data-driven, let modules add their components with a ui_kit.yml file, and let themes override them. The Icons API migration moved to !43, which ships with the Drupal 11.1 requirement.

Closes #3622922

Edited by Aaron Christian

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