Move setting sleep status to Rest API

Part of &9

What does this MR do?

Settings the sleeping status in the user settings is moved to a new REST controller. This removes some more old Xhr code.

How confident are you it won't break things if deployed?

Quite confident. It's unlikely that this really breaks anything, but there might be special cases I didn't think of.

How to test

1. Checkout branch locally
2. Login as foodsaver
3. Open the sleep status settings page http://localhost:18080/?page=settings&sub=sleeping
4. Change the status, optionally add a text, and submit
5. Open your profile page and check that there is a sleeping hat and that the text is visible

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• added to the next milestone (see https://gitlab.com/foodsharing-dev/foodsharing/-/milestones, unless it has a "for:Dev" label)
• added an entry to CHANGELOG.md
• added a short text that can be used in the release notes
• Once your MR has been merged, you are responsible to create a testing issue in the Beta Testing forum: https://foodsharing.de/?page=bezirk&bid=734&sub=forum. Please change the MRs label to "state:Beta testing".
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...) how this change can be tested.
  • Be aware, that also non technical people should understand.