Support specification of compatibility with --static-swift-stdlib

[MahdiBM]

As mentioned in issues such as apple/swift#68671 and apple/swift#65097, sometimes a Swift change is incompatible with --static-swift-stdlib (as in swift build -c release --static-swift-stdlib) but the problem is only discovered later on, after a Swift release.
This is despite the fact that using --static-swift-stdlib is very common in Server-Side Swift apps, and reference files such as Vapor's template Dockerfile have been using this flag for a long time.
All these while SE-0342 proposed --static-swift-stdlib to become the default behavior on platforms like Linux, which has yet to take effect.

So, the question is: should this repository support a JSON field to specify compatibility with --static-swift-stdlib (e.g. build_static_stdlib?
That way, it might be easier for the Swift team to keep track of compatibility of Swift releases with projects that use the --static-swift-stdlib flag.
Penny can be the first project to specify compatibility with that flag in the projects.json.