Also works on Apple Silicon. Specific signing values are in a non-committed file, and the ub2 script only notarizes if a "notarize" flag is passed in on the command line.
NOTE: the SDL dylib currently only has x86_64 and arm64, will need extra work to graft those back in and keep the Notary service happy.
Ignore auto generated or user configuration for MSVC projects.
Note: .user is ignored in Xcode section but applies to MSVC too.
Patch by @shearer12345.