Set top level name to be generic and move model info to products section

custom_components/tuya_local/devices/drexma_et7aw_thermostat.yaml

@@ -1,8 +1,9 @@
-name: Drexma WiStat Thermostat
+name: Thermostat
 products:
   - id: 1oi7spyvsihkwrrr
     manufacturer: Drexma Industries inc.
-    model: "ET-7AW"
+    model: "WiStat"
+    model_id: "ET-7AW"
 entities:
   - entity: climate
     dps: