Adds the DataTransferTask and DataTransferProgressDisplay classes, which use repurposed logic from the DownloadTask and EtaProgressDisplay classes, respectively. The EtaProgressDisplay class and EtaProgressInfo struct have been removed.
Other changes include:
* DownloadTask: heavily simplified logic by using DataTransferTask as the base class.
* DumpOptionsFrame: implement some additional/experimental changes.
* OptionsTab: update logic to use the new DataTransferProgressDisplay class.
* Use forward declarations for type definitions wherever suitable (e.g. NcaContext, BucketTreeContext).
* Replace references to "DumpDestination" with "OutputStorage".
* Replace references to "append key area" with "prepend key area".
* Update LZ4 to v1.9.4.
* Update Material Icons font to 2022-08-01.
* RootView: change USB-related icons, reflect how many UMS devices are currently connected to the console, provide a way for child views to retrieve the populated UMS devices vector.
* Tasks: implement GetUmsDevices().
* Update borealis.
* Update libusbhsfs.
* Begin implementation of a DumpOptionsFrame class to display configurable options before starting a new dump process.
* bktr: rename bktrIsValidSubstorage() to bktrIsValidSubStorage(), use bktrIsValidSubStorage() in bktrInitializeCompressedStorageContext(), fixed a bug in bktrReadCompressedStorage() where Sparse substorages wouldn't be allowed.
* GamecardTab: push a DumpOptionsFrame object onto the view stack if the XCI option is clicked.
