Fixed an issue where returning the app from the background would result in the app staying permanently on the splash screen
Included a CRC32 implementation so we can drop the CryptoSwift dependenciy (using CryptoKit everywhere else)
Removed 'SocketRocket' (unused)
Removed the `xcode_14_3_workaround` post-install hook (fixed with CocoaPods 1.12.1)
Removed the `enable_fts5_support` post-install hook (enabled by default since GRDB 6.7.0 so redundant)
Removed the `enable_whole_module_optimization_for_crypto_swift` post-install hook (dropped CryptoSwift support)
Cleared out a bunch of headers from the Signal-Bridging-header file (direct imports instead to reduce incremental build sizes)
Deleted some unused code
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)