Membership aware room routes (#2709)

* Remove the invites button when room list invites are enabled

* element-hq/element-x-ios/issues/2632 - Handle room permalinks based on their membership state and show the according room joining screens:
- modify the room flow coordinator to only take a roomID and be able to decide its own room flows (especially for unjoined rooms)
- add support for the new room preview API
- have RoomDirectorySearch go through the same paths

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -67,6 +67,20 @@ enum SessionVerificationState {
     case unverified
 }
 
+struct RoomPreviewDetails {
+    let roomID: String
+    let name: String?
+    let canonicalAlias: String?
+    let topic: String?
+    let avatarURL: URL?
+    let memberCount: UInt
+    let isHistoryWorldReadable: Bool
+    let isJoined: Bool
+    let isInvited: Bool
+    let isPublic: Bool
+    let canKnock: Bool
+}
+
 // sourcery: AutoMockable
 protocol ClientProxyProtocol: AnyObject, MediaLoaderProtocol {
     var actionsPublisher: AnyPublisher<ClientProxyAction, Never> { get }
@@ -123,6 +137,8 @@ protocol ClientProxyProtocol: AnyObject, MediaLoaderProtocol {
     
     func roomForIdentifier(_ identifier: String) async -> RoomProxyProtocol?
     
+    func roomPreviewForIdentifier(_ identifier: String) async -> Result<RoomPreviewDetails, ClientProxyError>
+    
     @discardableResult func loadUserDisplayName() async -> Result<Void, ClientProxyError>
     
     func setUserDisplayName(_ name: String) async -> Result<Void, ClientProxyError>