Create poll UX (#1571)

* Add poll attachment button

* Add poll creation feature flag

* Setup navigation to CreatePollScreen

* Add create/cancel actions

* Add create poll screen ui skeleton

* Add bindings in CreatePollScreen

* Add logics in CreatePollScreen

* Cleanup code

* Fix option deletion crash

* Fix conflicts

* Add create poll logic

* Add localisations

* Fix test build errors

* Fix crash

* Add UTs

* Add accessibility IDs

* Add ui tests

* Add 240 char limit

* Fix addOption hide behavior

* Add maxNumberOfOptions

* Cleanup code

* Move delete workaround in the view model

* Use compound delete icon

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

@@ -52,6 +52,7 @@ protocol DeveloperOptionsProtocol: AnyObject {
     var swiftUITimelineEnabled: Bool { get set }
     var pollsInTimelineEnabled: Bool { get set }
     var richTextEditorEnabled: Bool { get set }
+    var pollsCreationEnabled: Bool { get set }
 }
 
 extension AppSettings: DeveloperOptionsProtocol { }