Add constant MEDIA_SETTINGS_KEY to media

[johannaengland]

Scope and purpose

This will be used to simplify the plugins and to move more functionality to the base plugin. For now no changes in the functionality are done.

This is heavily inspired/copying some parts of #936.

Contributor Checklist

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Development docs.

• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
• Added/changed documentation, including updates to the user manual if feature flow or UI is considerably changed
• Linted/formatted the code with ruff and djLint, easiest by using pre-commit
• The first line of the commit message continues the sentence "If applied, this commit will ...", starts with a capital letter, does not end with punctuation and is 50 characters or less long. See our how-to
• If applicable: Created new issues if this PR does not fix the issue completely/there is further work to be done
• If this results in changes in the UI: Added screenshots of the before and after
• If this results in changes to the database model: Updated the ER diagram

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.89%. Comparing base (af003a8) to head (493db59).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2014   +/-   ##
=======================================
  Coverage   88.89%   88.89%           
=======================================
  Files         152      152           
  Lines        7283     7286    +3     
=======================================
+ Hits         6474     6477    +3     
  Misses        809      809           

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[github-actions]

Test results

    8 files  1 760 suites   2m 58s ⏱️
  980 tests   979 ✅ 1 💤 0 ❌
7 840 runs  7 832 ✅ 8 💤 0 ❌

Results for commit 493db59.

♻️ This comment has been updated with latest results.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud