Add module description field to Add New DQMH Module window

[Olivier-JOURDAN]

When creating new module, I'd like a way to add a text explaining its responsibility. It will reinforce good conception practices and allow Antidoc to retrieve information to generate a valuable documentation.

Note: IMO, this content should be added to the module lvlib description.

If this field could optionally mandatory to create the module, I would find this great 🙂