Update SDK->sdk, and add create_dataset (#1047)

### What problem does this PR solve?

Add create_dataset method, test for it, and update SDK->sdk.

### Type of change

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

Signed-off-by: cecilia-uu <konghui1996@163.com>

.gitignore

 rag/res/deepdoc
 
 # Exclude sdk generated files
-SDK/python/ragflow.egg-info/
-SDK/python/build/
-SDK/python/dist/
-SDK/python/ragflow_sdk.egg-info/
+sdk/python/ragflow.egg-info/
+sdk/python/build/
+sdk/python/dist/
+sdk/python/ragflow_sdk.egg-info/

sdk/python/README.md

+# infinity 

sdk/python/hello_ragflow.py

+import ragflow
+
+print(ragflow.__version__)

sdk/python/pyproject.toml

+[project]
+name = "ragflow"
+version = "0.8.0.dev1"
+authors = [
+  { name = "The RAGFlow Development Team", email = "author@example.com" },
+] # TODO: email
+dependencies = ["pytest~=8.2.0"]
+description = "ragflow"
+readme = "README.md"
+requires-python = ">=3.10"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: Apache License2",
+    "Operating System :: OS Independent",
+]
+
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project.urls]
+"Homepage" = "https://github.com/pypa/sampleproject"
+"Bug Tracker" = "https://github.com/pypa/sampleproject/issues"
+# TODO

sdk/python/ragflow/__init__.py

+import importlib.metadata
+
+__version__ = importlib.metadata.version("ragflow")

sdk/python/ragflow/ragflow.py

+#
+#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import os
+from abc import ABC
+
+
+class RAGFLow(ABC):
+    def __init__(self, user_key, base_url):
+        self.user_key = user_key
+        self.base_url = base_url
+
+    def create_dataset(self, name):
+        return name
+

sdk/python/setup.py

+# Copyright(C) 2023 InfiniFlow, Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import setuptools
+
+if __name__ == "__main__":
+    setuptools.setup(packages=['ragflow'])
+

sdk/python/test/test_basic.py

+from test_sdkbase import TestSdk
+import ragflow
+from ragflow.ragflow import RAGFLow
+import pytest
+
+
+class TestCase(TestSdk):
+    def test_version(self):
+        print(ragflow.__version__)
+
+    def test_create_dataset(self):
+        assert ragflow.ragflow.RAGFLow('123', 'url').create_dataset('abc') == 'abc'

sdk/python/test/test_sdkbase.py

+class TestSdk():
+    def test_version(self):
+        print("test_sdk")