delete SDK repo and edit readme (#1054)

### What problem does this PR solve?

delete SDK repo and edit readme

### Type of change

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

sdk/python/ragflow/__init__.py

@@ -1,3 +1,3 @@
 import importlib.metadata
 
-__version__ = importlib.metadata.version("ragflow")
+__version__ = importlib.metadata.version("ragflow")

sdk/python/ragflow/ragflow.py

@@ -15,6 +15,7 @@
 #
 import os
 from abc import ABC
+import requests
 
 
 class RAGFLow(ABC):
@@ -26,4 +27,28 @@ class RAGFLow(ABC):
         return name
 
     def delete_dataset(self, name):
-        return name
+        return name
+
+    def list_dataset(self):
+        endpoint = f"{self.base_url}/api/v1/dataset"
+        response = requests.get(endpoint)
+        if response.status_code == 200:
+            return response.json()['datasets']
+        else:
+            return None
+
+    def get_dataset(self, dataset_id):
+        endpoint = f"{self.base_url}/api/v1/dataset/{dataset_id}"
+        response = requests.get(endpoint)
+        if response.status_code == 200:
+            return response.json()
+        else:
+            return None
+
+    def update_dataset(self, dataset_id, params):
+        endpoint = f"{self.base_url}/api/v1/dataset/{dataset_id}"
+        response = requests.put(endpoint, json=params)
+        if response.status_code == 200:
+            return True
+        else:
+            return False