Singularity Shaders and a lot of Shader Stuff (#2517)

* Beginnings of singulo shader

* LOTS of changes!!

* Minor changes

* Singulo stuff

* Aesthetic changes to singulo

* Combining singulo change

* ShaderAura uses IEntities now, not IPlayerSession

* Fixes?

* Fixes draw order for atmos

* using fix

* Address reviews

* nuget.config whaaa

* nuget haha

* nuget why are you so dum

* happy now

* Preparing for omegachange

* Merge from seventh level of hell

* woork

* Ignorecomponents add

* mmf

* RobustToolbox?

* Fixes

* Fixes Robust?

* adds sprite

* Nullables

* Crit overlay stuff

* Commits Robust

Content.Client/Graphics/Overlays/CircleMaskOverlay.cs

@@ -1,5 +1,6 @@
-using Robust.Client.Graphics;
+using Robust.Client.Graphics;
 using Robust.Client.Player;
+using Robust.Shared.Enums;
 using Robust.Shared.IoC;
 using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
@@ -15,7 +16,7 @@ namespace Content.Client.Graphics.Overlays
         public override OverlaySpace Space => OverlaySpace.WorldSpace;
         private readonly ShaderInstance _shader;
 
-        public CircleMaskOverlay() : base(nameof(CircleMaskOverlay))
+        public CircleMaskOverlay()
         {
             IoCManager.InjectDependencies(this);
             _shader = _prototypeManager.Index<ShaderPrototype>("CircleMask").Instance();
@@ -23,7 +24,7 @@ namespace Content.Client.Graphics.Overlays
 
         protected override void Draw(DrawingHandleBase handle, OverlaySpace currentSpace)
         {
-            if (!GradientCircleMaskOverlay.LocalPlayerHasState(_playerManager, false, true))
+            if (!CritOverlay.LocalPlayerHasState(_playerManager, false, true))
                 return;
             handle.UseShader(_shader);
             var worldHandle = (DrawingHandleWorld)handle;