docs: Add out of maintenance message to readme

Author: pke

README.md

@@ -1,6 +1,13 @@
 # SQLite3-WinRT
 
-Async SQLite for (JavaScript) Windows Store apps.
+> Async SQLite for (JavaScript) Windows Store apps.
+
+## :warn: :warn: :warn: NO LONGER MAINTAINED
+
+This repository is no longer maintained.
+
+Find the active repo at https://github.com/pke/SQLite3-WinRT and file [issues](https://github.com/pke/SQLite3-WinRT/issues) and [Pull-Requests](https://github.com/pke/SQLite3-WinRT/pulls) over there.
+
 
 ## Changelog for version 1.1.0