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Additional references:
 - https://developer.apple.com/forums/thread/107922?answerId=328726022#328726022
 - https://hoishing.medium.com/adding-login-items-for-macos-7d76458f6495#:~:text=One%20could%20also,they%20are%20located.
 - https://theevilbit.github.io/posts/smappservice/
 - https://developer.apple.com/documentation/servicemanagement/smappservice?language=objc
 - https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/CreatingXPCServices.html#//apple_ref/doc/uid/10000172i-SW6-SW3