renderdevicevulkan: enable reverse depth
Reverse the DepthFunc on all shaders GREATER <-> LESS
gizmo_grid: reverse manual depth bias
We need to change the depth clear value from 1->0 (in 3 different places of course)
Recompiled core shaders
Fix r_depth_debug
Default RenderState DepthFunc to RS_CMP_GREATER_EQUAL, makes shaders without a RenderState set default to it
https://files.facepunch.com/sam/1b0711b1/tt3.png
Readjust depth bias on debug shaders for reverse depth
Fix shadow in reversed depth
https://files.facepunch.com/sam/1b0711b1/tt2.png
Adjust depth bias for gizmo shaders for the increased depth precision
Tiled light culling with reverse-z
SSR with inverted z ( Way more stable )
Fix (3D) Skybox with inverse depth range
Fix SSR backtracing on reverse depth
Remove shadow depth bias from shader, it should be controlled by shadow matrix on lightbinner
DoF with reverse depth
Shaders for reverse depth
Fix glass and decal overlays depth bias
Shaders with depth bias fixes