[Feature] Auto box scale

[brenocq]

Feature description
Idea from @fecaltransplant in #3 (reply in thread)

I notice that the box scale can be adjusted; would it be possible to snap the box to the data so that if I scale the data or move it around, that the box would scale/move along with the data?

Maybe a flag ImPlot3DAxisFlags_AutoBoxScale could be added for this.