Add device: Eufy Security - T8506 (#4512)

Author: github-actions[bot]

library/library.json

@@ -12146,6 +12146,13 @@
             "manufacturer": "ZVIDAR",
             "model": "Z-CM-V01",
             "battery_type": "Rechargeable"
+        },
+        {
+            "manufacturer": "Eufy Security",
+            "model": "T8506",
+            "model_id": "T8506",
+            "battery_type": "AA",
+            "battery_quantity": 8
         }
     ]
 }