Updated the migrations to indicate progress (Potential to base progress for the "processing" sections on the file size of the legacy database)
Updated the JobRunner to properly support concurrent queues for sending/receiving (other queues are still serial)
Added the typing indicator logic into the ConversationVC
Put code into SUKLegacy for connecting to the YDB database
Fixed a couple of minor UI bugs with the GalleryRailView
Updated the media gallery selection screen to use the appropriate system theme colouring (was painful to randomly swap from dark mode to like for one screen...)
Added an alert for when the database migration fails
Deleted the legacy migrations (manually applying any unapplied changes as part of the YDB to GRDB migration process)
Cleaned up the creation of the GRDBStorage instance
Fixed an issue where the launch screen wasn't setting it's background colour based on the system setting
Renamed the GRDBStorageError to StorageError (in preparation of legacy 'Storage' relocation)
Consolidated the two Environment classes (in Swift)
Refactored the AppSetup class to Swift
Renamed the 'Legacy' classes to have their library prefix (avoid confusion)
Removed the legacy Objective C Thread code (pulled only the NSCoding stuff into the 'SMKLegacy' type)
Refactored the SignalApp class to Swift
Fixed a horizontal alignment issue in the ConversationTitleView
Fixed an issue where expiration timer update messages weren't migrated or rendering correctly
Fixed an issue where expiring messages weren't migrated correctly
Fixed an issue where closed groups which had been left were causing migration failures (due to data incorrectly being assumed to be required)
Shifted the Legacy Attachment types into the 'SMKLegacy' namespace
Moved all of the NSCoding logic for the TSMessage
Moved the JobRunner into SessionUtilitiesKit so it can be used by SessionSnodeKit
Exposed a 'sharedLokiProject' value on UserDefaults to remove the hard-coded group name used everywhere
Added "blocking" job support for 'OnLaunch' and 'OnActive' jobs to the JobRunner (will retry until it succeeds)
Added the UpdateProfilePicture and RetrieveDefaultOpenGroupRooms jobs