Scaling back the artillery buff slightly

Preset changes:

Standard rules:

• Artillery charge cost: 25 -> 40

Lenient rules:

• Artillery charge cost: 20 -> 30

Punishing rules:

• Artillery charge cost: 30 -> 50

Standard complexity:

• Artillery charge multiplier step: 1.05 -> 1.2

• Artillery charge destruction step: 0.2 -> 1.175

Hard complexity:

• Artillery charge multiplier step: 1.1 -> 1.5

Notes:

Turns out I completely overtuned the artillery node in the last patch and made it way stronger than it should have been. Especially with the econ changes, you could fully charge an artillery node almost every turn and it would deal massive damage even at longer ranges. Now charging multiple pips in one turn is a more risky financial decision and not really worth it for blasting smaller enemy fleets. It should still retain its use as the tie-breaker for engaging def-post campers though.

Okay but NOW I'm actually gonna start working on refactoring and QoL-ing stuff for the fog of war update!