New item idea: sunglasses

[elunna]

I thought I saw a YANI for this but a search on the archives turned up nothing. Anyway, here's some ideas:

• Kind of like lenses but they protect from things like yellow lights and black lights.
• Maybe they also protect from some gaze attacks? Vs umber hulk I think it makes sense, possibly vs Medusa, but vs something like a pyrolisk I'm not sure. Definitely some room for discussion here.
• It would of course be nice if they protect vs floating eye gazes...
• Maybe they increase charisma by 1?
• It might be thematic to limit the standard field of vision to about an 8 square radius.