fix: Use BaseGame for defining game extension classes

src/biscuit/extensions/extensions.py

@@ -249,7 +249,7 @@ def register_installed(self, name: str, extension: object) -> None:
         try:
             extension.install()
         except Exception as e:
-            print("no install method !!!!!!!!!!!!")
+            print(e)
             # most likely the extension does not implement the install method
             ...