Content Scanner Service (#5826)

* implemented the content scanner service with caching and a way to use in the state store context

* fix swiftformat comment enforcing

* pr suggestions

ElementX/Sources/Services/Session/UserSessionProtocol.swift

@@ -25,6 +25,9 @@ protocol UserSessionProtocol: Sendable {
     var voiceMessageMediaManager: VoiceMessageMediaManagerProtocol { get }
     var liveLocationManager: LiveLocationManagerProtocol { get }
     
+    /// Scans media content, `nil` when no content scanner is configured for the server.
+    var contentScannerService: ContentScannerServiceProtocol? { get }
+    
     var sessionSecurityStatePublisher: CurrentValuePublisher<SessionSecurityState, Never> { get }
     
     var callbacks: PassthroughSubject<UserSessionCallback, Never> { get }