Add Climate and Weather Changes

1. Every provinces or countries of the map/game have a climate and weather. It is either balance, hot, cold etc. Units when conquering provinces will face this kinds of situation.

For example, The battle between Nazis and The Soviet Union on ww2. Soviet Union have a strong and very cold weather, which they can have an advantage from the Nazis to maybe slowdown the invasion. Nazis, withstanding the cold temperatures will make them weak due to winter and lack resources which they lost war on ww2.

This changes will affect the provinces,(maybe doctrine) and the daily upkeep. The longer the units stays on that situation, the more suffer and higher upkeep will cost.

For weather changes, add also sunny, rainy, storm days etc. Maybe this can change the game like climate does.