feat(rules): carried items + real steal transfers, unarmed-disarm auto-pickup

- Combatant.carried_items (APG Steal: non-wielded, non-closely-worn gear),
  loaded from JSON, seeded into CombatantState, exposed in the snapshot.
- _maneuver_steal: success transfers the first carried item victim -> thief
  (logged); empty list keeps the documented nothing-stealable behaviour.
- _maneuver_disarm: unarmed attacker's success auto-picks the dropped weapon
  into its carried_items (SRD Disarm); armed disarms unchanged. Dropped-weapon
  recovery via retrieve_weapon (move action) verified + pinned by tests.
- data/pcs: gear transcribed from Foundry sheet inventories (esha 13,
  jeanne 3, misty 9, nairda 7, oni 6, tammara 20); harvie/ierlieth/
  esha_mount and all monsters empty (no stealable inventory), noted in README.

src/pf1e_simulator/models.py

@@ -382,6 +382,18 @@ class Combatant(_FrozenModel):
     # PF1e two-axis alignment (SRD "Alignment"): law-good axis codes, one of
     # LG/NG/CG/LN/N/CN/LE/NE/CE. Default "N" (true neutral).
     alignment: str = "N"
+    # PF1e (APG "Steal"): carried items that are NEITHER wielded in a hand
+    # NOR closely worn - potions, scrolls, tools, pouches, keys, rations...
+    # "This maneuver can be used in melee to take any item that is neither
+    # held nor hidden in a bag or pack [...] Items that are closely worn
+    # (such as armor, backpacks, boots, clothing, or rings) cannot be taken
+    # with this maneuver. Items held in the hands (such as wielded weapons
+    # or wands) also cannot be taken with the steal maneuver - you must use
+    # the disarm combat maneuver instead." Wielded weapons live in
+    # ``attacks``; closely worn gear is not modeled (the AC in the JSON is
+    # a final value), so this list holds only stealable carried items.
+    # rules/advanced-players-guide/steal.md
+    carried_items: tuple[str, ...] = ()
 
     @field_validator("alignment")
     @classmethod