community: sambastudio chat model (#27056)

**Description:**: sambastudio chat model integration added, previously
only LLM integration
     included docs and tests

---------

Co-authored-by: luisfucros <luisfucros@gmail.com>
Co-authored-by: Chester Curme <chester.curme@gmail.com>

libs/community/tests/integration_tests/chat_models/test_sambanova.py

@@ -1,6 +1,9 @@
 from langchain_core.messages import AIMessage, HumanMessage
 
-from langchain_community.chat_models.sambanova import ChatSambaNovaCloud
+from langchain_community.chat_models.sambanova import (
+    ChatSambaNovaCloud,
+    ChatSambaStudio,
+)
 
 
 def test_chat_sambanova_cloud() -> None:
@@ -9,3 +12,11 @@ def test_chat_sambanova_cloud() -> None:
     response = chat.invoke([message])
     assert isinstance(response, AIMessage)
     assert isinstance(response.content, str)
+
+
+def test_chat_sambastudio() -> None:
+    chat = ChatSambaStudio()
+    message = HumanMessage(content="Hello")
+    response = chat.invoke([message])
+    assert isinstance(response, AIMessage)
+    assert isinstance(response.content, str)

libs/community/tests/unit_tests/chat_models/test_imports.py

@@ -35,6 +35,7 @@ EXPECTED_ALL = [
     "ChatPerplexity",
     "ChatPremAI",
     "ChatSambaNovaCloud",
+    "ChatSambaStudio",
     "ChatSparkLLM",
     "ChatTongyi",
     "ChatVertexAI",