CoreCommands: make some of the private API more public

This extends the visibility of some of the private implementation to the
package level to allow use for testing without `@testable` imports.

Author: compnerd

Sources/CoreCommands/SwiftCommandState.swift

@@ -318,7 +318,7 @@ public final class SwiftCommandState {
     }
 
     // marked internal for testing
-    init(
+    package init(
         outputStream: OutputByteStream,
         options: GlobalOptions,
         toolWorkspaceConfiguration: ToolWorkspaceConfiguration,
@@ -452,7 +452,7 @@ public final class SwiftCommandState {
         }
     }
 
-    func waitForObservabilityEvents(timeout: DispatchTime) {
+    package func waitForObservabilityEvents(timeout: DispatchTime) {
         self.observabilityHandler.wait(timeout: timeout)
     }
 
@@ -814,7 +814,7 @@ public final class SwiftCommandState {
         return buildSystem
     }
 
-    static let entitlementsMacOSWarning = """
+    package static let entitlementsMacOSWarning = """
     `--disable-get-task-allow-entitlement` and `--disable-get-task-allow-entitlement` only have an effect \
     when building on macOS.
     """