Weapon styles: warhammer, sword and shield, staff, bow; trophies in recipes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -23,6 +23,14 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
   one area per tier (Old Watchtower, Sunken Barrows, Iron Hills, Frostpeak,
   Dragon's Spine), each with a golem, a troll, a spirit and a flyer that drop
   trophies for stronger weapons, and a boss (the dragons at the top).
+- **Weapons:** four styles, one per trade, and anyone can use any of them.
+  Sword and shield (2.4s swings, the shield blocks 15% of hits; swords from
+  Smithing, shields from Construction), warhammer (Smithing; slow, heavy,
+  twice the crits), staff (Herblore; accurate, ignores armour) and bow
+  (Leatherworking; fast, strikes first). The last three take both hands and
+  carry a shield's power. Your trade's weapon does 15% more damage. Golems
+  break under hammers, trolls fall to swords, spirits only fear staves, and
+  flyers fall to bows. Past copper, each weapon needs its tier's trophies.
 - **Tiers:** six RuneScape-style tiers (copper, iron, steel, mithril,
   adamant, rune at levels 1–75) of ore, trees (up to enchanted) and hides (deer,
   boar and bear from hunting; green, blue and red dragonhide from fighting