add fastapi driver, config

nonebot/drivers/__init__.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from typing import Optional
+from ipaddress import IPv4Address
+
+
+class BaseDriver(object):
+
+    @property
+    def server_app(self):
+        raise NotImplementedError
+
+    @property
+    def asgi(self):
+        raise NotImplementedError
+
+    @property
+    def logger(self):
+        raise NotImplementedError
+
+    def run(self,
+            host: Optional[IPv4Address] = None,
+            port: Optional[int] = None,
+            *args,
+            **kwargs):
+        raise NotImplementedError