NFC: Mark some imports as @_spi(SwiftPMInternal)

Author: xedin

Sources/Commands/PackageCommands/Init.swift

@@ -12,7 +12,10 @@
 
 import ArgumentParser
 import Basics
+
+@_spi(SwiftPMInternal)
 import CoreCommands
+
 import Workspace
 import SPMBuildCore
 

Sources/Commands/SwiftBuildCommand.swift

@@ -12,9 +12,14 @@
 
 import ArgumentParser
 import Basics
+
 import Build
+
+@_spi(SwiftPMInternal)
 import CoreCommands
+
 import PackageGraph
+
 import SPMBuildCore
 import XCBuildSupport
 

Sources/Commands/SwiftTestCommand.swift

@@ -11,16 +11,22 @@
 //===----------------------------------------------------------------------===//
 
 import ArgumentParser
+
 @_spi(SwiftPMInternal)
 import Basics
+
+@_spi(SwiftPMInternal)
 import CoreCommands
+
 import Dispatch
 import Foundation
 import PackageGraph
 
 @_spi(SwiftPMInternal)
 import PackageModel
+
 import SPMBuildCore
+
 import func TSCLibc.exit
 import Workspace
 

Tests/PackageGraphTests/CrossCompilationPackageGraphTests.swift

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 @testable
+@_spi(SwiftPMInternal)
 import SPMTestSupport
 
 @testable