chore: import upstream snapshot with attribution

Sources/CVersion/include/Version.h

@@ -0,0 +1,39 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2025-2026 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.
+//===----------------------------------------------------------------------===//
+
+#ifndef CZ_VERSION
+#define CZ_VERSION "latest"
+#endif
+
+#ifndef GIT_COMMIT
+#define GIT_COMMIT "unspecified"
+#endif
+
+#ifndef RELEASE_VERSION
+#define RELEASE_VERSION "0.0.0"
+#endif
+
+#ifndef BUILDER_SHIM_VERSION
+#define BUILDER_SHIM_VERSION "0.0.0"
+#endif
+
+const char* get_git_commit();
+
+const char* get_release_version();
+
+const char* get_swift_containerization_version();
+
+const char* get_container_builder_shim_version();