Epic: create and join rooms - Start Chat (#680)

* add start chat flow with UI

* add feature flag for start chat

* add changelog

* fix naming and tests

* fix empty display name in user cell

* Update ElementX/Sources/Application/AppSettings.swift

Co-authored-by: Alfonso Grillo <alfogrillo@element.io>

* add screenshots from UI test

* fix swiftFormat and add identifiers

* fix warnings

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Co-authored-by: Alfonso Grillo <alfogrillo@element.io>

ElementX/Sources/UITests/UITestsAppCoordinator.swift

@@ -304,6 +304,11 @@ class MockScreen: Identifiable {
             let coordinator = ReportContentCoordinator(parameters: .init(itemID: "test", roomProxy: MockRoomProxy(displayName: "test")))
             navigationStackCoordinator.setRootCoordinator(coordinator)
             return navigationStackCoordinator
+        case .startChat:
+            let navigationStackCoordinator = NavigationStackCoordinator()
+            let coordinator = StartChatCoordinator(parameters: .init(userSession: MockUserSession(clientProxy: MockClientProxy(userID: "@mock:client.com"), mediaProvider: MockMediaProvider())))
+            navigationStackCoordinator.setRootCoordinator(coordinator)
+            return navigationStackCoordinator
         }
     }()
 }

ElementX/Sources/UITests/UITestsScreenIdentifier.swift

@@ -44,6 +44,7 @@ enum UITestsScreenIdentifier: String {
     case roomDetailsScreenWithRoomAvatar
     case roomMemberDetailsScreen
     case reportContent
+    case startChat
 }
 
 extension UITestsScreenIdentifier: CustomStringConvertible {