Issue 3469 dependency transition 13

[finestructure]

This is the first step to move the Github related dependencies into a GithubClient DependencyClient.

This step moves fetchLicense and also drops the client parameter from its function call. This trickles through to a few functions in Github which now have client-free overloads. The outdated versions are marked with deprecation warnings. These will all go away once we've fully transition alle three Github dependency functions over to GithubClient.

[finestructure]

I've marked this WIP for now as I've encountered a potentially blocking issue for using typed throws with swift-dependencies. If that can't be resolved, we may want to hold off moving Github functions out of AppEnvironment so we don't carry around deprecation warnings and method overloads for a long time.

[finestructure]

I've opened a discussion about the issue here: pointfreeco/swift-dependencies#324

There are a couple of possible workarounds:

• isolate the typed throw closures to a single @DependencyClient (possibly requiring one for each) - not ideal
• do this without the @DependencyClient macro (haven't tried it yet but that should work)

[finestructure]

Dropping the @DependencyClient macro worked for the typed throws dependency as a workaround.