Add a Tooltips feature

[Windvis]

Webuniversum has a tooltip feature that could also be useful for Appuniversum projects.

The details of how this should be implemented still need to be refined. Kaleidos already uses a custom version of this, so they would benefit from adding this to Appuniversum.

[Windvis]

It seems there is a fairly recent native "popover" feature in browsers that we could look into:

• https://codepen.io/melsumner/details/VwNmYLY
• https://developer.mozilla.org/en-US/docs/Web/API/Popover_API

[Windvis]

Another example we could use as inspiration: https://velvet-thunder.netlify.app/docs/components/tooltip

Our version doesn't need to be as flexible though.

[Saskapallayova]

I've noticed already 2 separate LBLOD platforms (Validation tool & LMB) use tooltips with different UIs, and I'm pretty sure GN also uses a tooltip somewhere I just can't find it :D

I'd say we have grounds to add this to AU now, so we can all use the same UI for them?

Examples of inconsistencies throughout the platforms: