chore: import upstream snapshot with attribution

python/semantic_kernel/contents/utils/finish_reason.py

@@ -0,0 +1,12 @@
+# Copyright (c) Microsoft. All rights reserved.
+from enum import Enum
+
+
+class FinishReason(str, Enum):
+    """Finish Reason enum."""
+
+    STOP = "stop"
+    LENGTH = "length"
+    CONTENT_FILTER = "content_filter"
+    TOOL_CALLS = "tool_calls"
+    FUNCTION_CALL = "function_call"