feat(gs/xanthous): Allow throwing rocks

Implement a first pass at a "fire" command, which allows throwing rocks,
the max distance and the damage of which is based on the weight of the
item and the strength of the player.

Currently the actual numbers here likely need some tweaking, as the
rocks are easily throwable at good distances but don't really deal any
damage.

Change-Id: Ic6ad0599444af44d8438b834237a1997b67f220f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3764
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/grfn/xanthous/src/Xanthous/messages.yaml

@@ -115,6 +115,28 @@ wield:
   # TODO: use actual hands
   wielded : You wield the {{wieldedItem.itemType.name}} in your right hand.
 
+fire:
+  nothing:
+    - You don't currently have anything you can throw
+    - You don't have anything to throw
+  zeroRange:
+    - That item is too heavy to throw!
+    - That's too heavy to throw
+    - You're not strong enough to throw that any meaningful distance
+  menu: What would you like to throw?
+  target: Choose a target
+  atRange:
+    - It's too heavy for you to throw any further than this
+  fired:
+    noTarget:
+      - You throw the {{item.itemType.name}} at the ground
+    noDamage:
+      - You throw the {{item.itemType.name}} at the {{creature.creatureType.name}}. It doesn't seem to care.
+      - You throw the {{item.itemType.name}} at the {{creature.creatureType.name}}. It doesn't seem to do anything.
+      - You throw the {{item.itemType.name}} at the {{creature.creatureType.name}}. It doesn't seem to hurt it.
+    someDamage:
+      - You throw the {{item.itemType.name}} at the {{creature.creatureType.name}}. It hits it on the head!.
+
 drop:
   nothing: You aren't carrying anything
   menu: What would you like to drop?