feat(editor): improve attendee and resource status display

[st3iny]

Resolves #4983

I refactored the logic and moved it to a computed prop to facilitate making use of the schedule status as well.

I also implemented some custom status messages if the scheduling fails for some reason (statuses 3.x and 5.x).

Screenshots

Organizer's view

Invitees	Resources

(In the example above, the user test was just added and the event was not saved yet. The same applies to the resource Croc.)

Attendee's view

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 46 lines in your changes missing coverage. Please review.

Project coverage is 22.99%. Comparing base (1d63a89) to head (ec5076f).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/components/Editor/AvatarParticipationStatus.vue	0.00%	38 Missing ⚠️
src/components/Editor/Resources/ResourceList.vue	0.00%	3 Missing ⚠️
...rc/components/Editor/Invitees/InviteesListItem.vue	0.00%	2 Missing ⚠️
...c/components/Editor/Resources/ResourceListItem.vue	0.00%	2 Missing ⚠️
src/components/Editor/Invitees/InviteesList.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6520      +/-   ##
============================================
- Coverage     23.17%   22.99%   -0.19%     
- Complexity      472      475       +3     
============================================
  Files           250      252       +2     
  Lines         12020    12118      +98     
  Branches       2296     2310      +14     
============================================
  Hits           2786     2786              
- Misses         8907     9005      +98     
  Partials        327      327              

Flag	Coverage Δ
javascript	14.52% <0.00%> (-0.14%)	⬇️
php	59.30% <ø> (-0.16%)	⬇️

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[GretaD]

the status icon is not aligned properly, it should be same everywhere. I remembered i fixed it here: #6580

[ChristophWurst]

@GretaD try updating the branch locally. The last commit here appears to be older than the merge commit of your fix.

[st3iny]

the status icon is not aligned properly, it should be same everywhere. I remembered i fixed it here: #6580

Is fixed by a rebase. I tested it locally again.