Video playback (#308)

* Create media player screen

* Introduce `FileCache` to cache message attachments

* Add file loading functionality into the media provider

* Process tap action on timeline items

* Pass item taps to view model

* Navigate to media player on view model callback

* Commit project file

* Add changelog

* Rename media to video

* Add a loader when large videos being processed

* Add back button explicitly on video screen, fixes for light scheme

* Handle right swipe to dismiss video

ElementX/Sources/Services/UserSession/UserSessionStore.swift

@@ -60,6 +60,7 @@ class UserSessionStore: UserSessionStoreProtocol {
             return .success(UserSession(clientProxy: clientProxy,
                                         mediaProvider: MediaProvider(clientProxy: clientProxy,
                                                                      imageCache: .onlyInMemory,
+                                                                     fileCache: .default,
                                                                      backgroundTaskService: backgroundTaskService)))
         case .failure(let error):
             MXLog.error("Failed restoring login with error: \(error)")
@@ -78,6 +79,7 @@ class UserSessionStore: UserSessionStoreProtocol {
             return .success(UserSession(clientProxy: clientProxy,
                                         mediaProvider: MediaProvider(clientProxy: clientProxy,
                                                                      imageCache: .onlyInMemory,
+                                                                     fileCache: .default,
                                                                      backgroundTaskService: backgroundTaskService)))
         case .failure(let error):
             MXLog.error("Failed creating user session with error: \(error)")