Support SwiftPM prebuilt libraries for faster macro and plugin dependencies

Tuist now reads SwiftPM prebuilt metadata from workspace-state.json, so macro and plugin dependencies can use SwiftPM’s prebuilt MacroSupport library instead of building SwiftSyntax from source. Regular runtime dependencies on SwiftSyntax continue to use source or cached framework targets, so only host-only macro and plugin paths get the prebuilt treatment. This speeds up generation and builds for projects that depend on SwiftPM macro packages such as SwiftSyntax.