[FR] Quick Fix on HassSetVolume: Use expansion rule instead of hardcoded de

[jlpouffier]

Problem

This sentence does not work:

• Règle le volume des enceintes sur 50%

But this one does:

• Règle le volume de les enceintes sur 50%

Solution

Just like we do for brightness, colors, and cover position, I am now using the expansion rule <de> instead of a hardcoded de here:

- "<regle> le volume [<de>] [<le>]{name} [à|sur] {volume:volume_level}<pourcent>"

This allows users to say more natural sentences for media players that are plural:

• Règle le volume des enceintes sur 50%

NOTE: I added tests with a plural example to make sure we think about these in the future.