added get_model to get the model of the miner, and reformatted the style of the miner factory getting miner to get a different miner for each type of supported miner

miners/antminer/X17/bmminer.py

@@ -0,0 +1,7 @@
+from miners.bmminer import BMMiner
+
+
+class BMMinerX17(BMMiner):
+    def __init__(self, ip: str) -> None:
+        super().__init__(ip)
+