Add support AC70 and AC70P devices

custom_components/bluetti_bt/bluetti_bt_lib/devices/ac70p.py

@@ -0,0 +1,8 @@
+"""AC70P fields."""
+
+from ..base_devices.ProtocolV2Device import ProtocolV2Device
+
+
+class AC70P(ProtocolV2Device):
+    def __init__(self, address: str, sn: str):
+        super().__init__(address, "AC70P", sn)