copy Process.swift from IntegrationTets and add a batSuffix attribute

Author: bkhouri

Sources/_InternalTestSupport/Process.swift

@@ -0,0 +1,49 @@
+/*
+ This source file is part of the Swift.org open source project
+
+ Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
+ Licensed under Apache License v2.0 with Runtime Library Exception
+
+ See http://swift.org/LICENSE.txt for license information
+ See http://swift.org/CONTRIBUTORS.txt for Swift project authors
+ */
+
+public import Foundation
+
+public enum OperatingSystem: Hashable, Sendable {
+    case macOS
+    case windows
+    case linux
+    case android
+    case unknown
+}
+
+extension ProcessInfo {
+    #if os(macOS)
+    public static let hostOperatingSystem = OperatingSystem.macOS
+    #elseif os(Linux)
+    public static let hostOperatingSystem = OperatingSystem.linux
+    #elseif os(Windows)
+    public static let hostOperatingSystem = OperatingSystem.windows
+    #else
+    public static let hostOperatingSystem = OperatingSystem.unknown
+    #endif
+
+    #if os(Windows)
+    public static let EOL = "\r\n"
+    #else
+    public static let EOL = "\n"
+    #endif
+
+    #if os(Windows)
+    public static let exeSuffix = ".exe"
+    #else
+    public static let exeSuffix = ""
+    #endif
+
+    #if os(Windows)
+    public static let batSuffix = ".bat"
+    #else
+    public static let batSuffix = ""
+    #endif
+}