Feat: Description per input

[meodai]

It would be awesome if it was possible to add a description for each input, to provide the user with some more context about some options. I am trying to build some kind of custom controls thing that works like the one used in storybook:

Is this something I could write a plugin for?

Thanks for your amazing work so far!

[cocopon]

Thank you for using Tweakpane.

After reading #508, I've thought that it would be useful to add a new kind of plugin that processes all existing and new blades (e.g. injecting views or buttons).

[braebo]

I've always thought tweakpane would work great with tooltip descriptions!