[Unknown Mod][Combat] Change the mouse cursor to indicate that ranged shot damage is reduced when a ranged unit shoots at a troop with an active Shield spell

[LeHerosInconnu]

When a ranged troop wants to shoot at a troop that is under the protection of the Shield spell, the mouse cursor is changed to a broken arrow cursor to indicate to the player that only half the damage will be applied.

This is not an option.
This can be implemented directly in fheroes2.