Show hovered Space View position for 2D & 3D space views

[Wumpf]

Via https://discord.com/channels/1062300748202921994/1075873257124810852/1133926881343840358

For all hover events in 2D & 3D space views we already know a position in that space (i.e. a position relative to the space's root entity). We should just display it.

Figure out where to show it in an unobtrusive way (as part of the "on hover stack"?)

Further work, orthogonal to some extent:
Showing a 3D position for hovering a depth image in 2D. We also have the necessary data (otherwise we couldn't project rays into 3D), but it's even less clear where to show that in a way it's not confusing -- maybe in the respective 3D spaces only, relative to those roots?)

[nikolausWest]

@martenbjork worth a look

[martenbjork]

@martenbjork worth a look

Happy to jam on this whenever we're ready to work on it. I might need a visual explainer :)

[jleibs]

Showing the projected coordinates relative to a different origin would be very powerful here as well.

Specifically I'm imagining hovering in the 2d view of the depth sensor, but seeing a value of an origin such as "world" when we have a pinhole projection linking us to that space.

[Wumpf]

Related to

• Show picking position when hovering something in the spatial view #3227
• Show the coordinate of what is being hovered in the tooltip #3226