Add disarm attack lock tactic

docs/GODOT_4_6_MIGRATION.md

@@ -51,8 +51,9 @@ powershell -NoProfile -ExecutionPolicy Bypass -File tools\check_godot46_readines
 - Poison Mist applies poison, poison ticks at the target team's phase start, and poison defeat immediately ends the battle when it satisfies a victory or defeat condition.
 - Seal Tactic applies seal, prevents the affected unit from using tactics during its next action phase, and disables the tactic button with a sealed forecast/badge.
 - Snare Tactic applies snare, prevents the affected unit from moving during its next action phase, and still leaves attacks, tactics, items, and wait available.
-- Support, debuff, poison, seal, and snare status pips appear on affected board units and disappear when those effects expire or are cured.
-- Antidote can cure poison, Panacea can cure poison, seal, or snare, and neither consumes stock when used on a target without a matching status.
+- Disarm Tactic applies disarm, prevents physical attacks and counterattacks, and still leaves movement, tactics, items, and wait available.
+- Support, debuff, poison, seal, snare, and disarm status pips appear on affected board units and disappear when those effects expire or are cured.
+- Antidote can cure poison, Panacea can cure poison, seal, snare, or disarm, and neither consumes stock when used on a target without a matching status.
 - Enemy turn advances and AI acts.
 - Victory and defeat panels still appear.
 - Post-battle dialogue and post-battle choices still block progression until a choice is saved.