add support for basic S9is

miners/antminer/bmminer/X9/S9i.py

@@ -0,0 +1,8 @@
+from miners._backends import BMMiner
+from miners._types import S9i
+
+
+class BMMinerS9i(BMMiner, S9i):
+    def __init__(self, ip: str) -> None:
+        super().__init__(ip)
+        self.ip = ip