Shelly Pro 3 EM: add more devices (#26851)

Author: VolkerK62

templates/definition/meter/shelly-pro-3em.yaml

@@ -1,8 +1,7 @@
 template: shelly-pro-3em
 products:
-  - brand: Shelly
-    description:
-      generic: Pro 3 EM
+  - { brand: Shelly, description: { generic: Pro 3 EM } }
+  - { brand: Shelly, description: { generic: 3 EM-63T/W Gen3 } }
 params:
   - name: usage
     choice: ["grid", "pv", "charge"]