feat(neon_framework): Support setting user status

[provokateurin]

Depends on #1375
Closes #442

TODO:

• Fix grid layout
• Write tests

[Leptopoda]

Initial imoression: the picker looks beautiful 😍

[provokateurin]

Just setting the icon/emoji will not work here because of a bug in server: nextcloud/server#42532

[provokateurin]

(just a rebase)

[Leptopoda]

On small display sizes the clear at selector should be underneath the message box.

[provokateurin]

Putting the message input and clear at in the same line was a bit too complex and I think this now looks better than before. No tests yet, but apart from that it is done.

[provokateurin]

I will rebase this onto #1418 once it is merged and change the clear at dropdown so it is more usable.

[provokateurin]

just a rebase, i still need to add the tests :/ haven't looked further into mocking the client or request manager.

[provokateurin]

@Leptopoda please review the bloc tests. I'm not sure yet if the way I did it is good, but I feel like it is the best we can do right now. Once we have more blocs with tests I'd like to merge the common logic, but there is no point in that right now.

[provokateurin]

@Leptopoda added widget tests as well, this should now have all the tests we need

[Leptopoda]

If you want feel free to send the clearAt stuff as a separate PR as this looks good

[Leptopoda]

two things:

1. please try to get a higher coverage in for the user status bloc
   • return a 204 status code (should retry)
   • return a not 204 status code (should emit error)
   • the if (!force && !result.hasError) { check
   • correctStatus with a predefined status set
   • whatever the line with find(userId: username);

I mean you are able to read a coverage report :P

2. On a fresh app start/hot restart the status remains in the loading state forever.