#748 - Implement methods for processing various media types and prepa… (#772)

* #748 - Implement methods for processing various media types and preparing them for upload

* Various tweaks following code review:
- added blurhash generation
- changed thumbnails to jpeg
- throwing if file size cannot be retrieved
- move MediaProvider files to separate folder so they can cleanly be imported in the NSE
- added audio file processing
- switched all image resizing methods to ImageIO
- various renames

* Fix blurhash formatting issues, `swift-format-ignore-file` doesn't work

* Processing all media within unique folders to avoid conflicts

* Fix various warnings

* Rename `sizeForItemAt(_ url: URL)` to `sizeForItem(at url: URL)`

* Remove unnecessary resizeImage(UIImage) method, start by copying not moving the file to the unique location

* Add back warning for roomDetails.avatarURL

ElementX/Sources/Screens/HomeScreen/HomeScreenViewModel.swift

@@ -219,7 +219,8 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
         var rooms = [HomeScreenRoom]()
         var createdRoomIdentifiers = [String: Bool]()
         
-        #warning("This works around duplicated room list items coming out of the SDK, remove once fixed")
+        // This works around duplicated room list items which happens because the 2 different ss lists used
+        // update at different times. That will be fixed once we move this logic to the Rust side
         func appendRoom(_ room: HomeScreenRoom, allRoomsProvider: Bool) {
             guard createdRoomIdentifiers[room.id] == nil else {
                 MXLog.error("Built duplicated room for identifier: \(room.id). AllRoomsSummaryProvider: \(allRoomsProvider). Ignoring")