The AI should preemptively kite creatures to avoid getting hit

[zenseii]

Preliminary checks

• I've checked that there aren't other open issues on the same topic.

Describe the problem requiring a solution

Currently the battle AI will wait until it has been struck to decide to kite, instead of kiting beforehand to avoid getting hit.

I found it reproducible with 150 greater druids against 350 golems:

fheroes2.engine.version_.1.0.7.2023-08-22.17-29-20.mp4

Describe the possible solution

Make the AI kite before getting struck if it is within the range of the opposing creature.

Additional info

Here is the relevant part of the code:

fheroes2/src/fheroes2/ai/normal/ai_normal_battle.cpp

Lines 604 to 619 in 0c08d95

	else {
	// Kiting enemy: Search for a safe spot unit can move to
	target.cell = FindMoveToRetreat( arena.getAllAvailableMoves( currentUnit ), currentUnit, enemies );
	if ( target.cell != -1 ) {
	DEBUG_LOG( DBG_BATTLE, DBG_INFO, currentUnit.GetName() << " archer kiting enemy, target cell is " << target.cell )
	// The target cell of the movement must be the cell that the unit's head will occupy
	const int32_t moveTargetIdx = getUnitMovementTarget( currentUnit, target.cell );
	DEBUG_LOG( DBG_BATTLE, DBG_INFO, currentUnit.GetName() << " moving to cell " << moveTargetIdx )
	if ( currentUnit.GetHeadIndex() != moveTargetIdx ) {
	actions.emplace_back( CommandType::MSG_BATTLE_MOVE, currentUnit.GetUID(), moveTargetIdx );
	}
	}