Update wrapAttributes "complex attributes" logic to exclude attributes with a single unnamed argument

This PR updates the wrapAttributes "complex attributes" logic to exclude attributes with a single unnamed argument.

This removes the need to special-case the @Environment attribute, which we specifically don't want to consider "complex". Since this doesn't require special casing any particular attribute, it generalizes to other similar attributes like @AppStorage from SwiftUI and @Dependency from TCA.

These are no longer considered complex, so can be configured to not wrap using --storedvarattrs same-line:

@Environment(\.controlPanelStyle) private var controlPanelStyle
@Dependency(\.controlsService) private var controlsService
@AppStorage("ControlsConfig") private var controlsConfig: ControlConfiguration

These examples are all still considered complex, so can be configured to always wrap using --complexattrs prev-line:

@AppStorage("ControlsConfig", store: myCustomUserDefaults)
private var controlsConfig: ControlConfiguration

@Tweak(name: "Aspect ratio")
private var aspectRatio = AspectRatio.stretch

@available(*, unavailable)
var saturn5Builder: Saturn5Builder

@available(*, unavailable, message: "No longer in production")
var saturn5Builder: Saturn5Builder

nicklockwood / SwiftFormat

Update wrapAttributes "complex attributes" logic to exclude attributes with a single unnamed argument #1595

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