feat: add explanation of queries

[jaulz]

It would be cool if we could explain SQL queries like suggested here:
#281

This PR is just a stub to explain how it would work in general.
@itsgoingd would you accept a complete PR for this?

[itsgoingd]

Hey, I would love to have this feature, but tbh I'm not even sure how I want it to work at this point. The soonest I would consider including something like this is the next major release, so I will keep this open until then.

If you would like to work on this further feel free to hop into our Discord, so we can figure out how this should work first.

[jaulz]

No worries, in the meantime I could use the custom tab functionality to get some of the desired functionality. I saw your other update about the new release so there are probably other low level tasks that are required first before we should tackle this?