Add movement order tactics

docs/GODOT_4_6_MIGRATION.md

@@ -46,6 +46,7 @@ powershell -NoProfile -ExecutionPolicy Bypass -File tools\check_godot46_readines
 - Finite-stock Shop entries show remaining counts and disable once sold out.
 - Manual checkpoint save/load restores the expected current briefing without script errors.
 - A player unit can move, attack, wait, use a tactic, use an item, and equip compatible gear.
+- March Order and Hamper Order adjust movement range while active and expire with the normal support/debuff timing.
 - 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.