+ Added SkillAPI support.

Guide on setup can be viewed here: https://git.spaceio.xyz/Scorpion/BCRanks/wiki/SkillAPI

Currently it supports 4 sections as i couldnt find many decent once to use.
If you have any, let me know and ill add it.

For those that don't quite know what skillapi is, skillapi is an rpg api that allows rpg plugins(such as MMOCore to create skills and other things.

This should support most plugins using skillapi for skilling and other, however if need be support for induvidual plugins is possible too.

Please note: i did not have the time to test this, nor the means, since i dont own any plugins using skillapi