Pill View (#1797)

* provider can now check the current session

* More testable code

* created the test condition

* it works but not always not sure why, need to dig deeper

* sadly we need to use textkit 1 to solve this issue

* removed developer option screen test

* this experimental solution kinda works but I need a way to pill recomputation is weird

* format

* display improvement

* better and faster solution

* pilished the code

* better coloring

* swift format

* just need to solve the caching issue

* fix caching issue

* tests done!

* changelog

* pr comments addressed

* all pr comments addressed

* docs

* line lenght

* updated tests and fixed a parsing permalink issue

* MentionBuilder

* pr comments

* swiftformat

* code blocks should not have links

* Update ElementX/Sources/FlowCoordinators/RoomFlowCoordinator.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Update ElementX/Sources/Services/Client/ClientProxy.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Update UnitTests/Sources/AttributedStringBuilderTests.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Update ElementX/Sources/UITests/UITestsAppCoordinator.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Update ElementX/Sources/Other/Pills/PillAttachmentViewProvider.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Update ElementX/Sources/Other/Pills/MentionBuilder.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* pr comments

* swiftformat

---------

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/DeveloperOptionsScreenModels.swift

@@ -50,6 +50,7 @@ protocol DeveloperOptionsProtocol: AnyObject {
     var readReceiptsEnabled: Bool { get set }
     var swiftUITimelineEnabled: Bool { get set }
     var voiceMessageEnabled: Bool { get set }
+    var mentionsEnabled: Bool { get set }
 }
 
 extension AppSettings: DeveloperOptionsProtocol { }