Fixes #2347, #2348, #2349 - Add support for typing notifications

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -33,6 +33,7 @@ enum RoomProxyError: Error, Equatable {
     case failedCheckingPermission
     case failedMarkingAsRead
     case failedMarkingAsUnread
+    case failedSendingTypingNotice
 }
 
 enum RoomProxyAction {
@@ -52,6 +53,7 @@ protocol RoomProxyProtocol {
     var ownUserID: String { get }
     
     var name: String? { get }
+    
     var displayName: String? { get }
     
     var topic: String? { get }
@@ -59,6 +61,8 @@ protocol RoomProxyProtocol {
     var avatarURL: URL? { get }
 
     var members: CurrentValuePublisher<[RoomMemberProxyProtocol], Never> { get }
+    
+    var typingMembers: CurrentValuePublisher<[String], Never> { get }
         
     var joinedMembersCount: Int { get }
     
@@ -108,6 +112,9 @@ protocol RoomProxyProtocol {
     
     func markAsRead(sendReadReceipts: Bool, receiptType: ReceiptType) async -> Result<Void, RoomProxyError>
     
+    /// https://spec.matrix.org/v1.9/client-server-api/#typing-notifications
+    @discardableResult func sendTypingNotification(isTyping: Bool) async -> Result<Void, RoomProxyError>
+    
     // MARK: - Element Call
     
     func canUserJoinCall(userID: String) async -> Result<Bool, RoomProxyError>