The only functionally relevant change is that orbiter scenes are now saved via SkinFlavourItem (as of U39?).
The rest is cleanup of the types because the ship customization stuff was duplicated all over the place.
Reviewed-on: #2402
Co-authored-by: Sainan <63328889+Sainan@users.noreply.github.com>
Co-committed-by: Sainan <63328889+Sainan@users.noreply.github.com>
