Added new rune efficiency setting

[Foolishmetal]

Added a new setting that calculates rune efficiency based on SWOP's updated formula.

[Xzandro]

We already talked about this in Discord, but just so I do not forget.

Personally, I would do the manipulation of the substats directly in the rune-efficiency plugin code (if the new SWOP efficiency setting is enabled of course) and then send that to the function to keep the function clean and without side effects.
Remove getRuneEfficiencySWOP, add a new setting to the existing rune-efficiency plugin, if that setting is enabled manipulate the rune props before sending it to the function.
This way, you have minimal code adjustments, can use an easily accessible settings and no duplicate code.

[Xzandro]

Is this still being worked on?