create dataset (#2074)

### What problem does this PR solve?

You can use sdk to create a dataset

### Type of change

- [x] New Feature

---------

Co-authored-by: root <root@xwg>

sdk/python/test/t_dataset.py

@@ -0,0 +1,23 @@
+from ragflow import RAGFlow
+
+from common import API_KEY, HOST_ADDRESS
+from test_sdkbase import TestSdk
+
+
+class TestDataset(TestSdk):
+    def test_create_dataset_with_success(self):
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        ds = rag.create_dataset("God")
+        assert ds is not None, "The dataset creation failed, returned None."
+        assert ds.name == "God", "Dataset name does not match."
+
+    def test_delete_one_file(self):
+        """
+        Test deleting one file with success.
+        """
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        ds = rag.create_dataset("ABC")
+        assert ds is not None, "Failed to create dataset"
+        assert ds.name == "ABC", "Dataset name mismatch"
+        delete_result = ds.delete()
+        assert delete_result is True, "Failed to delete dataset"