I think it's called a "Fletcher"

[Lav]

I'm not sure its even possible to make bows turn into melee. however i know nothing about modding so it would be nice if a dev would tell us now so we don't get our hopes up.

It's the same as Javelins. However I think player should be heavily penalized for using his bow in melee - even if it's made from steel it's still not intended to be used as a weapon, and there's the string too... So while basic stuff (making some bow switch mode between ranged mode and melee) is very simple, implementing this properly (like, I don't know, degrading item quality modifier for each melee hit or block until it gets down to Cracked) will still take some work and time.