SwiftPM prebuilt paths are sanitized and macro dylibs are locatable at runtime

Paths Tuist reads from SwiftPM workspace-state.json for dependency, artifact, prebuilt, checkout, and include locations are now sanitized for control characters and /private/var normalization, so control-character paths no longer abort AbsolutePath/RelativePath decoding. The prebuilt library directory is also added to LD_RUNPATH_SEARCH_PATHS so macro executables can locate Swift compatibility dylibs such as libswiftCompatibilitySpan.dylib at runtime.