increase immersion by showing bow in left hand and arrows in right

[ceejbot]

Because this is how archers IRL do it. The easiest way to do this by far is to do a variation on the swap I'm doing right now with arrows and the left hand:

• ammo ➜ right
• right ➜ left
• left not drawn

[ceejbot]

I took a run at this in the branch ceej/bows-in-left and woof, it's going to be annoying. I don't think the approach outlined in my initial issue report is going to work, because swapping left and right without swapping keypress meaning will be beyond confusing. So a real fix will involve putting ranged weapons and only ranged weapons into the left hand, and reworking the advance logic. The prospect of rewriting that logic fills me with despair.