feat: use footer from settings

[chinook25]

What are the main changes you did

• Changed the directory footer so that it is loaded from the directory settings.
• Closes https://github.com/molgenis/GCC/issues/548
• Settings are now only loaded once (they where retrieved at least 3 times).
• No longer need to refresh after saving settings.

How to test

• Go to the directory.
• Note the lack of specific footer
• Login
• Go to the settings of the app
• in the JSON editor edit the footerfield, or if not present, add it.
• save
• See that your edit now appears at the near bottom of the page.

Checklist

• updated docs in case of new feature
• added/updated tests
• added/updated testplan to include a test for this fix, including ref to bug using # notation

[mswertz]

I suppose a good default would help?

[chinook25]

I asked Dieuwke what would be prefered here.

[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

[dtroelofsprins]

I've tried to include the current footer, but gave up after some attempts. Then used just some plain text and styling html code and that indeed works fine. Footer is nicely placed, under the cards and above the general MOLGENIS EMX2 footer, just as it is now.