add llamafactory-cli env

Former-commit-id: 1df077184845ff5f394b9324d46f8c382869e590

src/llamafactory/extras/packages.py

@@ -20,6 +20,10 @@ def _get_package_version(name: str) -> "Version":
         return version.parse("0.0.0")
 
 
+def is_deepspeed_available():
+    return _is_package_available("deepspeed")
+
+
 def is_fastapi_available():
     return _is_package_available("fastapi")