Media uploading (#851)

* MediaUploadingPreprocessor - Prevent images without any GPS metadata from being changed

* Add support for sending images

* Add support for sending video, audio and file attachments

* Rename MediaPickerPreview to MediaUploadPreview

* Move media uploading to the MediaUploadPreviewScreen, add waiting indicators and error handling

* Add support for pasting and drag&dropping in media for upload

* Adopt new media picker source UI, remove developer flag

* Set minimum heights for timeline loadable images

* Fix invalid camera picker file names

* Fix flakey MediaUploadingPreprocessor image tests, improve gps metadata stripping

* UITests: Update existing screenshots and add new step for the room attachment picker

* Switch all github action runners to macos-13

* Cleanup enter key and paste message composer handlers

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -26,6 +26,7 @@ enum RoomScreenViewModelAction {
     case displayCameraPicker
     case displayMediaPicker
     case displayDocumentPicker
+    case displayMediaUploadPreviewScreen(url: URL)
 }
 
 enum RoomScreenComposerMode: Equatable {
@@ -62,6 +63,8 @@ enum RoomScreenViewAction {
     case displayCameraPicker
     case displayMediaPicker
     case displayDocumentPicker
+    
+    case handlePasteOrDrop(provider: NSItemProvider)
 }
 
 struct RoomScreenViewState: BindableState {
@@ -73,7 +76,6 @@ struct RoomScreenViewState: BindableState {
     var isBackPaginating = false
     var showLoading = false
     var timelineStyle: TimelineStyle
-    var mediaUploadingFlowEnabled: Bool
     
     var bindings: RoomScreenViewStateBindings