Overwhelming Firepower Idea ID

Add this idea with the add_ideas command and the idea ID superior_firepower_army_spirit.

While active, Overwhelming Firepower applies the following modifiers in Hearts of Iron IV:

• Experience Gain Artillery Combat+10%
• Unit Infantry Design Cost-100%
• Unit Artillery Brigade Design Cost-100%
• Unit Artillery Design Cost-100%
• Unit Mot Artillery Brigade Design Cost-100%
• Unit Light Sp Artillery Brigade Design Cost-100%
• Unit Medium Sp Artillery Brigade Design Cost-100%
• Unit Heavy Sp Artillery Brigade Design Cost-100%
• Unit Super Heavy Sp Artillery Brigade Design Cost-100%
• Unit Bicycle Battalion Design Cost-100%