fix: template cover add position action (#877)

* Update const.py

* Update __init__.py

* Update template_cover.cpp

* Update __init__.py

* Update test3.yaml

* formatting code

* formatting code 2

* removed position lambda

* Update test3.yaml

* Update __init__.py

tests/test3.yaml

@@ -578,6 +578,10 @@ cover:
       - output.set_level:
           id: out
           level: !lambda "return tilt;"
+    position_action:
+      - output.set_level:
+          id: out
+          level: !lambda "return pos;"
 
 
 output: