Add Assassin weapon for Large races

[DM Nixie]

Presently, the weapon the assassin mechanics are tied to is a dagger, a Tiny weapon. Large races cannot equip Tiny weapons at all. Therefore, Large races cannot function as assassins.

Please add a Small weapon that Large race assassins can use in its stead.

[Twohand]

This is completed and should likely be online next reset. Large races will need to request a replacement from the DM team if they already got a dagger.