chore: import upstream snapshot with attribution

Sources/ContainerizationOCI/State.swift

@@ -0,0 +1,82 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2025-2026 Apple Inc. and the Containerization 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.
+//===----------------------------------------------------------------------===//
+
+public enum ContainerState: String, Codable, Sendable {
+    case creating
+    case created
+    case running
+    case stopped
+}
+
+public struct State: Codable, Sendable {
+    public init(
+        version: String,
+        id: String,
+        status: ContainerState,
+        pid: Int,
+        bundle: String,
+        annotations: [String: String]?
+    ) {
+        self.ociVersion = version
+        self.id = id
+        self.status = status
+        self.pid = pid
+        self.bundle = bundle
+        self.annotations = annotations
+    }
+
+    public init(instance: State) {
+        self.ociVersion = instance.ociVersion
+        self.id = instance.id
+        self.status = instance.status
+        self.pid = instance.pid
+        self.bundle = instance.bundle
+        self.annotations = instance.annotations
+    }
+
+    public let ociVersion: String
+    public let id: String
+    public let status: ContainerState
+    public let pid: Int
+    public let bundle: String
+    public var annotations: [String: String]?
+}
+
+public let seccompFdName: String = "seccompFd"
+
+public struct ContainerProcessState: Codable, Sendable {
+    public init(version: String, fds: [String], pid: Int, metadata: String, state: State) {
+        self.ociVersion = version
+        self.fds = fds
+        self.pid = pid
+        self.metadata = metadata
+        self.state = state
+    }
+
+    public init(instance: ContainerProcessState) {
+        self.ociVersion = instance.ociVersion
+        self.fds = instance.fds
+        self.pid = instance.pid
+        self.metadata = instance.metadata
+        self.state = instance.state
+    }
+
+    public let ociVersion: String
+    public var fds: [String]
+    public let pid: Int
+    public let metadata: String
+    public let state: State
+}