Prevent entity with accentuated names in make:entity

[olberger]

It seems that one can use accents (french ones for instance) in entity names, when using make:entity.

Even though PHP allows it, there are problems afterwards (with Doctrine, SQLite for instance).

It would probably be wise to filter input and refuse problematic characters in class/entity names.

Hope this helps.

And yes, I know... who in their right mind would be designing model entities with french vocabulary... newbees, obviously ;-)

[weaverryan]

PR welcome to tighten this up :)

[vsyrovat]

IMO issue is not fully resolved, see #1474 (comment) for details.