Create real-time 3d point cloud viewer

[vadixidav]

To show the output of vSLAM and visual odometry algorithms, we need a crate that can efficiently take VBOs of points to display and render them. A crate should be written to do the rendering and a separate crate should be created for an example viewer, including the controls. A good start would be to load a PLY file using the ply-rs crate or an LAS file using the las crate.

wgpu should be used to target all systems. It is recommended to use iced, which (on master branch) can natively render on the web or desktop using wgpu.

[vadixidav]

@Schweeble is working on this now, assigning.