SwiftUI timeline refactor + TimelineViewState decoupling

[Velin92]

This is the best approach I could achieve so far.

The performances are great, the timeline has never been so fast. The animations look very clean, sending messages and pagination are faster than ever (probably their updates were delayed by a ton of main thread async updates before).

Animations that did not work previously now work, for example now Collapsible items are animated.

https://drive.google.com/file/d/1waiVkKgY-0Xhw3g3wdcH6SLHa0kVT_4P/view?usp=drive_link

[github-actions]

	Warnings
⚠️	Please add a changelog.
⚠️	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.
⚠️	ElementX/Sources/Screens/RoomScreen/RoomScreenViewModel.swift#L448 - SwiftLint rule 'function_body_length' did not trigger a violation in the disabled region. Please remove the disable command. (superfluous_disable_command)

Generated by 🚫 Danger Swift against b1950b7

[github-actions]

📱 Scan the QR code below to install the build for this PR.
🔒 This build is for internal testing purpose. Only devices listed in the ad-hoc provisioning profile can install Element Alpha.

If you can't scan the QR code you can install the build via this link: https://i.diawi.com/h9ditF

[codecov]

Codecov Report

Patch coverage: 9.66% and project coverage change: -0.60% ⚠️

Comparison is base (43dafda) 45.33% compared to head (8067410) 44.74%.

❗ Current head 8067410 differs from pull request most recent head b1950b7. Consider uploading reports for the commit b1950b7 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1392      +/-   ##
===========================================
- Coverage    45.33%   44.74%   -0.60%     
===========================================
  Files          388      389       +1     
  Lines        24716    24871     +155     
  Branches     12604    12686      +82     
===========================================
- Hits         11205    11128      -77     
- Misses       13224    13462     +238     
+ Partials       287      281       -6     

Flag	Coverage Δ
unittests	22.94% <8.69%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
ElementX/Sources/Other/ScrollViewAdapter.swift	53.57% <0.00%> (-7.66%)	⬇️
...X/Sources/Screens/RoomScreen/View/RoomScreen.swift	49.54% <0.00%> (-9.23%)	⬇️
...een/View/Style/TimelineItemBubbledStylerView.swift	56.75% <0.00%> (-0.68%)	⬇️
...creen/View/Style/TimelineItemPlainStylerView.swift	0.00% <0.00%> (ø)
...Screens/RoomScreen/View/Style/TimelineStyler.swift	9.21% <0.00%> (ø)
...en/View/Supplementary/TimelineItemStatusView.swift	61.53% <0.00%> (-8.74%)	⬇️
...en/View/Timeline/CollapsibleRoomTimelineView.swift	0.00% <0.00%> (ø)
...een/View/Timeline/ReadMarkerRoomTimelineView.swift	0.00% <0.00%> (ø)
.../Timeline/TimelineItems/RoomTimelineItemView.swift	45.00% <0.00%> (-15.79%)	⬇️
...Sources/Screens/RoomScreen/View/TimelineView.swift	5.42% <1.73%> (-67.50%)	⬇️
... and 3 more

... and 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[stefanceriu]

Left some minor comments but otherwise I absolutely love it! 👏👏👏

[pixlwave]

This looks amazing, love it! 🤩

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
2.0% Duplication