New Engine Features: Weapon Style utils

[4Luke4]

Opcode 73 (0x49):

• special bit0 => right/mainhand only, special bit1 => left/offhand only.

Opcode 342 (0x156):

• param2 == 5 already lets effects replace RNDBASE combat-round bitmaps. With special bit0 set, EEex treats repeated offhand markers in that bitmap as extra offhand attacks and stores the THAC0 delta (param3) to apply to each such generated roll.

EEex_Sprite_GetWeaponStyle(sprite):

• Returns the given sprite's currently active weapon style, the active rank for that style, and the original rank recorded on the creature before active stat and effect modification.

Fixes:

• GetMinDamage()/GetMaxDamage() report rows for the hand-specific damage bonuses but their total range omits those fields. Adjust only the display total; the actual combat damage path reads the same stats independently.
• When enabling the Extra Combat Info hidden game option, the vanilla call site can pass a right-hand aggregate while formatting a left-hand breakdown, so replace only the integer argument with the damage bonus matching the currently selected hand.

See also: Bubb13/EEex#130.