fix(rules): apply the power attack penalty to melee touch attacks

PF1e (CRB Power Attack): "take a -1 penalty on all melee attack rolls ...
The bonus damage does not apply to touch attacks." A melee touch (kind
"touch", no range increment) is a melee attack, so _power_attack_amt now
rides its attack and confirmation rolls; the +2X/+3X damage bonus stays
gated on kind == "melee". Ranged attacks and rays are unaffected. The
test that pinned the old melee-weapon-only simplification was rewritten to
lock the corrected behavior; README and abilities.py updated.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/pf1e_simulator/abilities.py

@@ -139,8 +139,9 @@ DODGE = AbilitySpec(
     ),
 )
 
-# Power Attack: active feat — declare at turn start, -X atk / +2X dmg on all
-# melee attacks this turn, where X = BAB//4 + 1 (min 1). No passive modifiers;
+# Power Attack: active feat — declare at turn start, -X atk on all melee
+# attack rolls (melee touch included) and +2X dmg on melee WEAPON damage only
+# (never touch), where X = BAB//4 + 1 (min 1). No passive modifiers;
 # the engine checks for this feat and the ``power_attack`` flag on state.
 POWER_ATTACK = AbilitySpec(
     name="Power Attack",