5037: Introduce section teaser

[xendk]

Link to issue

https://platform.dandigbib.org/issues/5037

Description

Add a teaser field to sections for rendering in section groups.

Screenshot of the result

Checklist

• My complies with our coding guidelines.
• My code passes our static analysis suite. If not then I have added a comment explaining why this change should be exempt from the code standards and process.
• My code passes our continuous integration process. If not then I have added a comment explaining why this change should be exempt from the code standards and process.

[holt83]

Nice looks useful :)

Was wondering: any reason the section (and fields) is not exported with features?

[xendk]

Ask the original developer. 🤷

I've mentioned that it would be smart to get that fixed on https://platform.dandigbib.org/issues/4276

[cableman]

It seams that the new field only is installed in an update hook and not on new sites?

Should the field also have been added to _ding_sections_create_fields?