If there are idle villagers, the idle villager button should be yellow instead of grayed out. The number of idle villagers should be shown in the bottom-right of the button.
Clicking the button (or pressing the corresponding hotkey) should toggle between all idle villagers.
Hints: Iterate over map->GetObjects(), check IsUnit(), GetPlayerIndex() == match->GetPlayerIndex(), and IsVillager() for each entry, and check whether the UnitAction is UnitAction::Idle to find the idle villagers. Use ClearSelection(), AddToSelection(), and SelectionChanged() to modify the selection.
Hints: Iterate over
map->GetObjects(), checkIsUnit(),GetPlayerIndex() == match->GetPlayerIndex(), andIsVillager()for each entry, and check whether theUnitActionisUnitAction::Idleto find the idle villagers. UseClearSelection(),AddToSelection(), andSelectionChanged()to modify the selection.