chore: import upstream snapshot with attribution

Sources/ContainerResource/Container/ContainerStopOptions.swift

@@ -0,0 +1,32 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2026 Apple Inc. and the container project authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+
+import Foundation
+
+public struct ContainerStopOptions: Sendable, Codable {
+    public var timeoutInSeconds: Int32
+    public var signal: String?
+
+    public static let `default` = ContainerStopOptions(
+        timeoutInSeconds: 5,
+        signal: nil
+    )
+
+    public init(timeoutInSeconds: Int32, signal: String?) {
+        self.timeoutInSeconds = timeoutInSeconds
+        self.signal = signal
+    }
+}