Turtle shell armor

[cdsupina]

When picked up by the player provides a set number, of armor against damage from the player's back. I.e the player can take a set out amount of hits from the back without dying.

This would involve giving the player an armor attribute and incrementing it to the amount of armor the turtle shell armor provides. As mentioned by @olefasting, when the player takes damage, the direction parameter of the kill method can be checked to see whether it was taken from behind. If it was taken from behind, decrement the armor value. Otherwise, the player should die as usual.

[cdsupina]

#53

[erlend-sh]

We have some preliminary sounds that could work for this:
https://drive.google.com/drive/folders/1q2hG8a-Zzrzt1DbOjRSqH2lGqGvxOuPj

They're intended for metal armor so it's not spot-on, but TINK #1 sounds like a pretty decent fit.