Add deprecation info to readme

README.md

@@ -3,6 +3,8 @@
 [![Package Version](https://img.shields.io/hexpm/v/spacetraders_sdk)](https://hex.pm/packages/spacetraders_sdk)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-ffaff3)](https://hexdocs.pm/spacetraders_sdk/)
 
+## <font color="red">IMPORTANT: Replaced by [spacetraders_models](https://hexdocs.pm/spacetraders_models) and [spacetraders_api](https://hexdocs.pm/spacetraders_api)</font>
+
 ```sh
 gleam add spacetraders_sdk@1
 ```