CI: build for arm64 and arm32 Linux and arm64 macOS

[theofficialgman]

closes #23

I am hoping this gets published on itch.io!

See https://github.com/theofficialgman/Celeste64/releases/tag/v1.1.0-arm64 for test build

[NoelFB]

Looks great, thank you! Yeah I would like to publish these on itch in the near future.
Edit: Oh just realized it's a draft, but I can merge once you're done making modifications.

[theofficialgman]

Ready to merge once FosterFramework/Foster#62 is merged and the dependency here is bumped

You can ping me once that PR gets merged and the version in Celeste64 bumped and I can rebase and trigger a final test build before merging this.

[NoelFB]

Foster is updated, waiting for NuGet to index 0.1.18

[NoelFB]

Looks like it's up now.

[theofficialgman]

I am going to switch macOS to an osx-any build (arm64 and x64 in one executable).
Are you able to test that on an x64 or arm64 (preferably both) mac?

[NoelFB]

I unfortunately don't have access to a mac at all right now :(
EDIT: But I think doing that in general makes sense, and anyone who has a Mac and runs into problems can bring them up. I'm not going to put the Mac version on itch yet due to various issues.

[NoelFB]

Is this good to merge in? I see it's not in draft state anymore but not sure if there's anything else you wanted to tweak!

[theofficialgman]

I am going to switch macOS to an osx-any build (arm64 and x64 in one executable). Are you able to test that on an x64 or arm64 (preferably both) mac?

sorry I was mistakem about this. it appears to not be supported automatically as of now dotnet/sdk#9795
since I am not a macos developer and can't even test that I will leave it separate for now

[theofficialgman]

tested. all good on ARM32 linux and ARM64 linux

[NoelFB]

Awesome, thanks for your work on this!