fix(rules): exempt retrieve and repair weapon from the disabled hit-point cost

PF1e (CRB, Disabled): a disabled creature can take move actions without further injuring itself. retrieve_weapon and repair_weapon are budget-classified move actions (_ACTION_ECONOMY_MOVE_KINDS) but were absent from _DISABLED_MOVE_KINDS, so a creature at 0 hp paid 1 hp to draw or mend a weapon. Added both kinds to the exempt set.

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

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

src/pf1e_simulator/combat.py

@@ -195,8 +195,18 @@ _HELPLESS_CONDITION_NAMES: frozenset[str] = frozenset(
 # PF1e (CRB, Disabled): at exactly 0 hp a creature takes only a single move
 # or standard action (staggered, half speed); move-equivalent and free
 # activities are not "strenuous" and cost no hp — everything else does.
+# retrieve_weapon / repair_weapon are move actions (CRB: drawing or mending a
+# weapon is a move action), so they belong here too.
 _DISABLED_MOVE_KINDS: frozenset[str] = frozenset(
-    {"move", "5foot_step", "stand_up", "drop_prone", "wait"}
+    {
+        "move",
+        "5foot_step",
+        "stand_up",
+        "drop_prone",
+        "wait",
+        "retrieve_weapon",
+        "repair_weapon",
+    }
 )
 # PF1e (CRB, Combat Maneuver): attempting a combat maneuver provokes an
 # attack of opportunity from the target unless the attacker holds the