refactor: The first refactored version for sdk release (#907)

Co-authored-by: chengfangyin2 <chengfangyin3@jd.com>

dbgpt/app/scene/chat_db/auto_execute/example.py

@@ -0,0 +1,33 @@
+from dbgpt.core._private.example_base import ExampleSelector, ExampleType
+
+## Two examples are defined by default
+EXAMPLES = [
+    {
+        "messages": [
+            {"type": "human", "data": {"content": "查询用户test1所在的城市", "example": True}},
+            {
+                "type": "ai",
+                "data": {
+                    "content": """{\n\"thoughts\": \"直接查询用户表中用户名为'test1'的记录即可\",\n\"sql\": \"SELECT city FROM user where user_name='test1'\"}""",
+                    "example": True,
+                },
+            },
+        ]
+    },
+    {
+        "messages": [
+            {"type": "human", "data": {"content": "查询成都的用户的订单信息", "example": True}},
+            {
+                "type": "ai",
+                "data": {
+                    "content": """{\n\"thoughts\": \"根据订单表的用户名和用户表的用户名关联用户表和订单表，再通过用户表的城市为'成都'的过滤即可\",\n\"sql\": \"SELECT b.* FROM user a  LEFT JOIN tran_order b ON a.user_name=b.user_name  where a.city='成都'\"}""",
+                    "example": True,
+                },
+            },
+        ]
+    },
+]
+
+sql_data_example = ExampleSelector(
+    examples_record=EXAMPLES, use_example=True, type=ExampleType.ONE_SHOT.value
+)