turnip: shader blit path
This is my project for this week, a rewrite of the tu_blit.c
I wrote a few months ago, now with a shader clear path to be able to deal depth/stencil aspect masks and depth/stencil clears for sysmem rendering. It will allow copy and non-GMEM clear of MSAA resources, which 2D blit path also can't do.
Edited by Jonathan Marek