Revise README for repository migration and archiving

Updated README to reflect repository migration and archived status.

Author: alexslavr

README.md

@@ -1,4 +1,10 @@
-# ⚠️ Repository is archived ⚠️
+# [Archived] DevExtreme UI and Visualization Components for Angular
+
+This repository has been migrated to the [DevExtreme](https://github.com/DevExpress/DevExtreme/) monorepo. Active development of DevExtreme Angular components continues in the following directory: [DevExtreme/packages/devextreme-angular](https://github.com/DevExpress/DevExtreme/tree/HEAD/packages/devextreme-angular). 
+
+---
+
+The following issues and pull requests were closed: 
+- [Issues](https://github.com/DevExpress/devextreme-angular/issues?q=is%3Aissue%20closed%3A2026-02-13)
+- [Pull Requests](https://github.com/DevExpress/devextreme-angular/pulls?q=is%3Apr+closed%3A2026-02-13)
 
-- [Issues that were closed during archiving](https://github.com/DevExpress/devextreme-angular/issues?q=is%3Aissue%20closed%3A2026-02-13)
-- [PRs that were closed during archiving](https://github.com/DevExpress/devextreme-angular/pulls?q=is%3Apr+closed%3A2026-02-13)