Added additional *RemainingSpellSlots() functions + bugfixes in NWNX_Creature

[Cjreek]

• GetSpellsPerDayLeft()
• IncrementSpellsPerDayLeft() >> IncrementRemainingSpellSlots()
• DecrementSpellsPerDayLeft() >> DecrementRemainingSpellSlots()
• ResetSpellsPerDayLeft() >> ResetRemainingSpellSlots()

The counter parts to the memorized spell functions for caster classes that don't memorize spells.

[Cjreek]

Nevermind. All of those already exist (Set instead of increment/decrement, but whatever). Please close and decline

[Cjreek]

Wait, I'll remove the duplicates and keep the increment/decrement functions and make the old ones future proof for .35

[Cjreek]

Okay. That was a little bit messy. Should have gone to bed earlier. I promise it's good now 😆 Done

[Daztek]

Can you redo your PR without all the fixes? Basically just your additional functions, I'd like to do the num multiclass stuff all in one go on the .35 branch.

And I believe NWNX_Creature_ReadySpells already behaves like your NWNX_Creature_ResetRemainingSpellSlots

[Cjreek]

Made a fresh one without any extra stuff. Closing this one