"View only" polls in the timeline (#1399)

* Add stub methods in RoomTimelineItemFactory

* Add PollRoomTimelineView and PollEndRoomTimelineView

* Add timeline skeleton

* Start poll mapping

* Add comment

* Refine poll UI

* Add feature flags for polls

* Cleanup

* Delete poll end event

* Refine poll mapping

* Refine poll layout

* Reuse FormRowAccessory

* Refine poll bubble layout

* Localise strings

* Update project

* Refine poll preview

* Map poll properties

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/PollRoomTimelineItem.swift

@@ -0,0 +1,50 @@
+//
+// Copyright 2023 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+struct PollRoomTimelineItem: Equatable, EventBasedTimelineItemProtocol {
+    let id: TimelineItemIdentifier
+    let poll: Poll
+    let body: String
+    let timestamp: String
+    let isOutgoing: Bool
+    let isEditable: Bool
+    let sender: TimelineItemSender
+    var properties: RoomTimelineItemProperties
+}
+
+struct Poll: Equatable {
+    let question: String
+    let pollKind: Kind
+    let maxSelections: Int
+    let options: [Option]
+    let votes: [String: [String]]
+    let endDate: Date?
+
+    enum Kind: Equatable {
+        case disclosed
+        case undisclosed
+    }
+
+    struct Option: Equatable {
+        let id: String
+        let text: String
+        let votes: Int
+        let allVotes: Int
+        let isSelected: Bool
+    }
+}