Is your feature request related to a problem? Please describe.
I would love the ability to be able to add a custom tooltip text to my custom trigger auras.

For example, I have an aura that displays the cooldown of the extra action bar, and I'd love to be able to give it a tooltip that lets me know what the ability does.

Describe the solution you'd like
It would be as simple as adding a function/field called "Tooltip Info" when defining a custom trigger, just like how "Duration Info", "Name Info" and "Icon Info" work right now.

Describe alternatives you've considered
I'm sure you could do it with some sort of hacky custom code implementation, but this solution seems more elegant.

You can do that with TSU by setting the property "tooltip" https://github.com/WeakAuras/WeakAuras2/wiki/Trigger-State-Updater-(TSU)#tooltips