LiteButtonAuras shows your buffs on you and your debuffs on your target inside your action buttons with a colored border and timer. It is like AdiButtonAuras, and Inline Aura before it, just much dumber and much easier to maintain.
A buff you cast on yourself shows a green highlight in ability button:
A debuff you cast on your target shows red highlight in ability button:
By default LiteButtonAuras will only show buffs and debuffs where the aura name matches the ability. You can add more with a slash command.
For more information please see the README on github.