chore: import upstream snapshot with attribution

python/samples/service_settings.py

@@ -0,0 +1,22 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+from typing import Literal
+
+from semantic_kernel.kernel_pydantic import KernelBaseSettings
+
+
+class ServiceSettings(KernelBaseSettings):
+    """The Learn Resources Service Settings.
+
+    The settings are first loaded from environment variables. If the
+    environment variables are not found, the settings can be loaded from a .env file with the
+    encoding 'utf-8' as default or the specific encoding. If the settings are not found in the
+    .env file, the settings are ignored; however, validation will fail alerting that the settings
+    are missing.
+
+    Args:
+        global_llm_service: The LLM service to use for the samples, either "OpenAI" or "AzureOpenAI"
+            If not provided, defaults to "AzureOpenAI".
+    """
+
+    global_llm_service: Literal["OpenAI", "AzureOpenAI"] = "AzureOpenAI"