IYY-285: Site editors can add a caption to Image Banner

[joetower]

IYY-285: Site editors can add a caption to Image Banner

Description of work

• Adds image caption field (field_text) to the image banner
• Wires the caption
• Component Library: IYY-285: Site editors can add a caption to Image Banner | Update Image Banner component to use caption component-library-twig#450
• Atomic: IYY-285: Site editors can add a caption to Image Banner | Wiring atomic#292

Functional testing steps:

• Visit test page: https://pr-833-yalesites-platform.pantheonsite.io/page-with-image-banner
• Verify you see an image caption under the Image Banner

[github-actions]

Created multidev environment pr-833 for yalesites-platform.

[codechefmarc]

All of this looks good to me, the only thing I can see is when you are in layout builder, the caption shows up on top of the image. It looks fine once you save, so not sure if you want to make any adjustments:

[codechefmarc]

Oh, and this is not part of this ticket, but I also noticed that the image banner is using the "default" view mode for images, which doesn't use a responsive image style and also doesn't work with focal point. I'll check with Duncan to see if we should add to their Jira board.

[joetower]

@codechefmarc I pushed up a fix for the caption in layout-builder. It was picking up way too broadly defined .caption styles from Drupal.

I'll look into the image styes being used for the Image Banner. My Lando is refusing to run today, so it might not happen until the new year.

[codechefmarc]

I talked with David about it earlier today and they are aware of the image style for the image banner. So, no worries in looking into it, I believe they already have a ticket in place to fix eventually.