Upgrade SwiftSyntax to 5.10 (via macros package, which got a bump). I was getting an absurd number of SPM failures which seem to have gone away after upgrading to the 510.x series.
Upgrade Swift tooling to 5.10 (SwiftSyntax is somewhat specific to Swift tooling); everyone should have this by now.
Fix unrelated lint (new in Xcode 16; we don't actually need that @State, but in related news, iOS 17+ get a new @Previewable annotation which lets us simplify the examples that DO need state... we can switch next year)
@State, but in related news, iOS 17+ get a new@Previewableannotation which lets us simplify the examples that DO need state... we can switch next year)