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/Other/AccessibilityIdentifiers.swift

@@ -40,6 +40,7 @@ struct A11yIdentifiers {
     static let migrationScreen = MigrationScreen()
     static let notificationSettingsScreen = NotificationSettingsScreen()
     static let notificationSettingsEditScreen = NotificationSettingsEditScreen()
+    static let createPollScreen = CreatePollScreen()
 
     struct AnalyticsPromptScreen {
         let title = "analytics_prompt-title"
@@ -181,6 +182,19 @@ struct A11yIdentifiers {
         let roomTopic = "create_room-room_topic"
     }
 
+    struct CreatePollScreen {
+        let question = "create_poll-question"
+        let create = "create_poll-create"
+        let addOption = "create_poll-add_option"
+        let pollKind = "create_poll-kind"
+
+        private let optionPrefix = "create_poll-option"
+
+        func optionID(_ index: Int) -> String {
+            "\(optionPrefix)-\(index)"
+        }
+    }
+
     struct WelcomeScreen {
         let letsGo = "welcome_screen-lets_go"
     }