External domain datatype

[johnatawnclementawn]

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

The underlying use case of the Language datatype is to be able to use values from a database table as values in tile data and not have to ETL those data into controlled lists or concepts (and then keep them in sync). This work proposes the External Domain datatype (subject to naming change) to provide baseline functionality for that use case.

Issues Solved

Closes #

Checklist

• I targeted one of these branches:
  • dev/8.2.x (under development): features, bugfixes not covered below
  • dev/8.1.x (main support): regressions, crashing bugs, security issues, major bugs in new features
  • dev/7.6.x (extended support): major security issues, data loss issues
• I added a changelog in arches/releases
• I submitted a PR to arches-docs (if appropriate)
• Unit tests pass locally with my changes
• I added tests that prove my fix is effective or that my feature works
• My test fails on the target branch

Accessibility Checklist

Developer Guide

Topic	Changed	Retested
Color contrast
Form fields
Headings
Links
Keyboard
Responsive Design
HTML validation
Screen reader

Ticket Background

• Sponsored by:
• Found by: @
• Tested by: @
• Designed by: @

Further comments