Assaults and Close Combats

I’ve added a new work-in-progress version to the GitHub repo that includes assaults and close combats. Surprisingly they work pretty much as intended, although they are probably not balanced at all right now! Infantry have the ability to do an anti-tank attack in close combat, representing the use of grenades and molotovs at close range, but it’s not very effective and can result in the loss of an attacker step. In the future, certain units will have much better close combat anti-armour attacks, such as pioneers and units armed with panzerfausts and similar weapons.