Wire loot tables into corpse creation

Combat engine looks up mob template loot table and passes to
create_corpse. Goblin template now drops crude club (80%) and
1-3 gold coins (50%).

content/mobs/goblin.toml

@@ -4,3 +4,14 @@ pl = 50.0
 stamina = 40.0
 max_stamina = 40.0
 moves = ["punch left", "punch right", "sweep"]
+
+[[loot]]
+name = "crude club"
+chance = 0.8
+description = "a crude wooden club"
+
+[[loot]]
+name = "gold coin"
+chance = 0.5
+min_count = 1
+max_count = 3

src/mudlib/combat/engine.py

@@ -171,11 +171,15 @@ async def process_combat() -> None:
                 # Despawn mob losers, send victory/defeat messages
                 if isinstance(loser, Mob):
                     from mudlib.corpse import create_corpse
+                    from mudlib.mobs import mob_templates
                     from mudlib.zone import Zone
 
                     zone = loser.location
                     if isinstance(zone, Zone):
-                        create_corpse(loser, zone)
+                        # Look up loot table from mob template
+                        template = mob_templates.get(loser.name)
+                        loot_table = template.loot if template else None
+                        create_corpse(loser, zone, loot_table=loot_table)
                     else:
                         from mudlib.mobs import despawn_mob