Higher Color Depth Export

[Zi7ar21]

Currently, the program only exports 8-Bit (Per Channel) PNG files along with whatever else the render state is. It would be nice to have a different export option like a 16-Bit (Per Channel) PNG, or ideally a 32-Bit (Per Channel) Floating-Point OpenEXR file. OpenEXR is the best option since it natively supports floating point numbers without any of the weirdly supported TIFF 32-Bit (Per-Channel) mess. It would allow better editing in programs like GIMP afterwards.