[DE] Add Sentences to Trigger Device-Names in Areas

[badewanne1234]

In German, its possible to trigger device_class items in an area

Example: sentences/de/cover_HassTurnOn.yaml

 - sentences:
          - <öffnen> <area> (<abdeckung>|<tor>|<garage>)

However, its not possible to trigger a name/alias device in an area, it does not exist.

In contrast in English, this is possible (sentences/en/cover_HassTurnOn.yaml):

- sentences:
          - "<open> <name> [in <area>]"
- sentences:
          - "<open> [the] {cover_classes:device_class} in <area>"
          - "<open> <area> {cover_classes:device_class}"