Introduce a new RoomProxyType and treat rooms differently based on their membership state

[stefanceriu]

No description provided.

[pixlwave]

Very nice tidy-up, this is much safer 👏👏👏

Did it need any Rust changes in the end?

[github-actions]

	Warnings
⚠️	This pull request seems relatively large. Please consider splitting it into multiple smaller ones.
⚠️	Please provide a description for this PR.
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against a11b549

[sonarcloud]

Quality Gate failed

Failed conditions
9.4% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 85.36585% with 30 lines in your changes missing coverage. Please review.

Project coverage is 77.66%. Comparing base (e0ba992) to head (a11b549).
Report is 1 commits behind head on develop.

Files	Patch %	Lines
ElementX/Sources/Application/AppCoordinator.swift	0.00%	9 Missing ⚠️
...urces/Screens/HomeScreen/HomeScreenViewModel.swift	76.66%	7 Missing ⚠️
...reens/JoinRoomScreen/JoinRoomScreenViewModel.swift	77.77%	6 Missing ⚠️
...Sources/FlowCoordinators/RoomFlowCoordinator.swift	66.66%	3 Missing ⚠️
.../FlowCoordinators/UserSessionFlowCoordinator.swift	0.00%	2 Missing ⚠️
...X/Sources/Screens/CallScreen/View/CallScreen.swift	0.00%	1 Missing ⚠️
...en/NotificationSettingsEditScreenCoordinator.swift	0.00%	1 Missing ⚠️
...rces/Services/ElementCall/ElementCallService.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3187      +/-   ##
===========================================
- Coverage    77.90%   77.66%   -0.25%     
===========================================
  Files          717      718       +1     
  Lines        56527    56617      +90     
===========================================
- Hits         44039    43970      -69     
- Misses       12488    12647     +159     

Flag	Coverage Δ
unittests	68.39% <85.36%> (-0.01%)	⬇️

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