Plain composer suggestions and pills

[stefanceriu]

• allow user suggestions on the plain composer
• render pills within it for supported permalinks
• intentional mention support
• various other small tweaks

[pixlwave]

Wooop 👏

[pixlwave]

Might be worth adding a doc as to why we have both UserID and UserDisplayName attributes.

[github-actions]

	Warnings
⚠️	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 4ab7439

[codecov]

Codecov Report

Attention: Patch coverage is 37.11340% with 122 lines in your changes are missing coverage. Please review.

Project coverage is 73.49%. Comparing base (d067e84) to head (4ab7439).

Files	Patch %	Lines
...een/ComposerToolbar/ComposerToolbarViewModel.swift	22.78%	61 Missing ⚠️
...omposerToolbar/View/MessageComposerTextField.swift	38.88%	22 Missing ⚠️
.../ComposerToolbar/CompletionSuggestionService.swift	47.50%	21 Missing ⚠️
ElementX/Sources/Other/Pills/MentionBuilder.swift	14.28%	6 Missing ⚠️
...rToolbar/CompletionSuggestionServiceProtocol.swift	53.84%	6 Missing ⚠️
...Screen/ComposerToolbar/ComposerToolbarModels.swift	33.33%	2 Missing ⚠️
...mScreen/ComposerToolbar/View/ComposerToolbar.swift	50.00%	2 Missing ⚠️
...entX/Sources/Other/Pills/PlainMentionBuilder.swift	0.00%	1 Missing ⚠️
...mScreen/ComposerToolbar/View/MessageComposer.swift	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2751      +/-   ##
===========================================
- Coverage    74.93%   73.49%   -1.44%     
===========================================
  Files          582      597      +15     
  Lines        40896    42682    +1786     
===========================================
+ Hits         30644    31368     +724     
- Misses       10252    11314    +1062     

Flag	Coverage Δ
unittests	62.17% <37.11%> (-0.16%)	⬇️

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[sonarcloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[pixlwave]

That drop in coverage seems very wrong for the size of this patch. Lets merge and see what happens once we have UI/integration test runs too.