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/View/DeveloperOptionsScreen.swift

@@ -70,6 +70,10 @@ struct DeveloperOptionsScreen: View {
                 Toggle(isOn: $context.pollsInTimelineEnabled) {
                     Text("View polls in timeline")
                 }
+
+                Toggle(isOn: $context.pollsCreationEnabled) {
+                    Text("View polls creation flow")
+                }
             }
 
             Section("Rich Text Editor") {