added system group to skills dataset
added system group to skills dataset

Holyphoenix/nodebb-plugin-openfantasy,psychobunny/nodebb-plugin-openfantasy,psychobunny/nodebb-plugin-openfantasy,psychobunny/nodebb-plugin-openfantasy,Holyphoenix/nodebb-plugin-openfantasy,Holyphoenix/nodebb-plugin-openfantasy