[Feature] Damage calculations should better take into account hit-based attacks

[fribbels]

Motivation

Currently damage calcs for the most part assume the attacks are a single hit. The per-hit stacking mechanics of the ashblazing set are calculated by averaging the ATK buff out so it looks like it's ramping up, but is actually still counted as a single hit

We are probably OK for a while but Acheron seems to be heavily hit-count-based so that might be a good time to revisit

Objective

Have the calculations consider hit based attacks for each skill based on hit split https://honkai-star-rail.fandom.com/wiki/Damage#Hit_Split

Note: This should wait til after the optimization engine redesign