Create subpackages to only include endpoints that are used

[AvdLee]

By separating the package into subpackages, we allow implementors to only use the endpoints they need. CreateAPI/CreateAPI#57 researched build times and showed that it's not easy to improve build times right now.

I'm pretty sure if packages include less files, build times will improve.

For example, we could follow the headers from this menu:

Maybe it's possible using interfaces, e.g. import AppStoreConnect_Swift_SDK.TestFlight

[kean]

build times

~20 seconds on 10-core M1 Pro. I think that's as good as it gets for 75K lines.

[AvdLee]

~20 seconds on 10-core M1 Pro. I think that's as good as it gets for 75K lines.

Interesting, I feel like it takes much longer locally for me. Either way: this ticket is also here to solve the large executable size after archiving. I'm hoping to lower it by just including the packages required for a project