Add sdk for list agents and sessions (#3848)

### What problem does this PR solve?

Add sdk for list agents and sessions

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>

sdk/python/test/test_sdk_api/t_agent.py

@@ -0,0 +1,9 @@
+from ragflow_sdk import RAGFlow,Agent
+from common import HOST_ADDRESS
+import pytest
+
+@pytest.mark.skip(reason="")
+def test_list_agents_with_success(get_api_key_fixture):
+    API_KEY=get_api_key_fixture
+    rag = RAGFlow(API_KEY,HOST_ADDRESS)
+    rag.list_agents()

sdk/python/test/test_sdk_api/t_dataset.py

@@ -51,4 +51,5 @@ def test_delete_datasets_with_success(get_api_key_fixture):
 def test_list_datasets_with_success(get_api_key_fixture):
     API_KEY = get_api_key_fixture
     rag = RAGFlow(API_KEY, HOST_ADDRESS)
+    rag.create_dataset("test_list_datasets")
     rag.list_datasets()

sdk/python/test/test_sdk_api/t_session.py

@@ -107,4 +107,11 @@ def test_create_agent_conversation_with_success(get_api_key_fixture):
     API_KEY = "ragflow-BkOGNhYjIyN2JiODExZWY5MzVhMDI0Mm"
     rag = RAGFlow(API_KEY,HOST_ADDRESS)
     session = Agent.create_session("2e45b5209c1011efa3e90242ac120006", rag)
-    session.ask("What is this job")
+    session.ask("What is this job")
+
+@pytest.mark.skip(reason="")
+def test_list_agent_sessions_with_success(get_api_key_fixture):
+    API_KEY = "ragflow-BkOGNhYjIyN2JiODExZWY5MzVhMDI0Mm"
+    agent_id = "2710f2269b4611ef8fdf0242ac120006"
+    rag = RAGFlow(API_KEY,HOST_ADDRESS)
+    Agent.list_sessions(agent_id,rag)