SwiftPM warning control settings (treatAllWarnings, treatWarning, enableWarning) supported

Tuist’s PackageInfo decoder and settings mapper now recognize SwiftPM’s newer treatAllWarnings, treatWarning, and enableWarning target build settings. They lower to the same OTHER_SWIFTFLAGS / OTHER_CFLAGS / OTHER_CPLUSPLUSFLAGS flags SwiftPM itself emits, so a package like swift-dependencies 1.13.0 no longer fails PackageInfo decoding, and generated projects preserve the package author’s warning behavior for Swift, C, and C++ settings. Unsupported combinations (linker targets, Swift enableWarning) are still rejected, matching SwiftPM.