Fixed 16-bit color issues!

This adds some fixes to 16-bit colors. Before there were issues where the Vulkan image format used to store 16-bpp image data. These issues are now fixed using a more "native" format that is equivalent to how After Effects handles the 16-bit color channels. In particular these issues would manifest in areas of the image where the RGBA color values would accumulate to near their maximum(Bright whites, reds, greens, cyans, etc).

Before:

After: