moving announcement to readme (#202)

Author: tcappellari-bdai

README.md

@@ -1,3 +1,23 @@
+# Repository Migration Notice
+
+> [!IMPORTANT]
+> This repository is moving to the **RAI-Opensource** GitHub organization in **about 2 weeks from April 9, 2026 (UTC)**.
+>
+> Current status: **pre-migration**.
+> Migration target org: <https://github.com/RAI-Opensource>
+>
+> What to do now:
+>
+> - Watch this repository for the final cutover update and destination repository link.
+> - Plan to update your git remote after the move:
+>
+>   ```bash
+>   git remote set-url origin <new-repository-url>
+>   ```
+>
+> - If you maintain downstream docs/scripts, prepare to update links from this repository to the new org.
+>
+
 # `synchros2`
 
 ![Python Support](https://img.shields.io/badge/python-3.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)