feat: Add dbgpt client and add api v2

dbgpt/client/app.py

@@ -0,0 +1,18 @@
+from dbgpt.client.client import Client
+
+
+async def get_app(client: Client, app_id: str):
+    """Get an app.
+    Args:
+        client (Client): The dbgpt client.
+        app_id (str): The app id.
+    """
+    return await client.get("/apps/" + app_id)
+
+
+async def list_app(client: Client):
+    """List apps.
+    Args:
+        client (Client): The dbgpt client.
+    """
+    return await client.get("/apps")