Orbital camera control / Meshcat-like controls

[TheotimeLH]

Hello,

Thank you for developing this visualizer. I'm trying to migrate to it from Meshcat, and jumping from one to another the camera controls feel a bit unusual.

In Candlewick you chose a cylindrical movement for the mouse left click, whereas Meshcat uses an orbital one.

I made a table from what I understand about the bindings

I asked @oomcth and @fabinsch to review both and we believe it'd be nice to add an option to change camera to Meshcat-like controls.

We find it more natural to have:

• One button for the camera angle
• The other one moving the camera target point
  Instead of mixing both together. This way we can change the camera angle diagonally by going both left-right and up-down.

This feature request isn't urgent at all,
Thanks