Expand plugin docs
Expand plugin docs

Closes #1365

gaidarenko/stylelint,stylelint/stylelint,heatwaveo8/stylelint,gaidarenko/stylelint,heatwaveo8/stylelint,gucong3000/stylelint,hudochenkov/stylelint,stylelint/stylelint,stylelint/stylelint,gaidarenko/stylelint,gucong3000/stylelint,heatwaveo8/stylelint,stylelint/stylelint,gucong3000/stylelint,hudochenkov/stylelint,hudochenkov/stylelint