feat(hunterbk_hf6602t_doorbell): add M18 model

PR #5538 by @hudsonbrendon

custom_components/tuya_local/devices/huntertbk_hf6602t_doorbell.yaml

@@ -3,6 +3,8 @@ products:
   - id: tftanqr9elztfkdp
     manufacturer: HunterTBK
     model: HF-6602T
+  - id: is5yumkqdhcfxskv
+    model: M18
 entities:
   - entity: switch
     name: Camera record