Allow themes to support metadata links - Fixes issue #12

[rhodges]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for metadata links in themes by introducing a new metadata_url field to the Theme model. The change allows themes to specify custom metadata URLs that take precedence over the existing hardcoded v1 parent metadata lookup.

Key changes:

• Added a new metadata_url field to the Theme model
• Updated the metadata_link method to prioritize the new field over hardcoded values
• Made the new field available in the Django admin interface

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
layers/models.py	Added metadata_url field to Theme model and updated metadata_link method logic
layers/migrations/0026_theme_metadata_url.py	Django migration to add the new metadata_url field to the database
layers/admin.py	Added metadata_url field to the Theme admin interface

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}