This introduces async frame writing, meaning that dandere2x should be able to extract frames faster, as well as being able to customize how many frames you can be max ahead by, allowing for "theoretically" faster performance. Will need feedback to see if it works or not.
Also fixes config file that was designed for RealSR and not waifu2x-ncnn-vulkan, and left a note in the root directory for those using RealSR.