Add EOL notice

Author: gesellix

README.md

@@ -1,3 +1,10 @@
+**This repository is no longer maintained.**
+
+The final release of this project is available as `2025-11-13T22-10-00` for Java 17+.
+Further development and maintenance of a low-level implementation will continue at https://github.com/docker-client/docker-remote-api-client/.
+
+---
+
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