See if we can get the display to be rendered with control in the loop

[nic-barbara]

Start with adapting basic.cc into Julia. We want a simple wrapper that people can run with something like this:

function visualise()
    viewer = open_viewer(model, data)
    while <window is open>
        # do controls, data.ctrl = ....
        mj_step(model, data)
        viewer.render()
    end
    viewer.close()
end

Useful to just check things are working and visualise behaviour.

[nic-barbara]

The visualiser in https://github.com/Lyceum/LyceumMuJoCoViz.jl is fantastic and we should try to adapt this instead of re-inventing the wheel. I'll start there.

[nic-barbara]

Basic renderer developed here: #14