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/EntryPoint.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using Content.Client.Administration;
 using Content.Client.Changelog;
 using Content.Client.Eui;
@@ -152,12 +152,15 @@ namespace Content.Client
             IoCManager.Resolve<IGameHud>().Initialize();
             IoCManager.Resolve<IClientNotifyManager>().Initialize();
             IoCManager.Resolve<IClientGameTicker>().Initialize();
+
             var overlayMgr = IoCManager.Resolve<IOverlayManager>();
             overlayMgr.AddOverlay(new ParallaxOverlay());
-            overlayMgr.AddOverlay(new GradientCircleMaskOverlay());
+            overlayMgr.AddOverlay(new SingularityOverlay());
+            overlayMgr.AddOverlay(new CritOverlay()); //Hopefully we can cut down on this list... don't see why a death overlay needs to be instantiated here.
             overlayMgr.AddOverlay(new CircleMaskOverlay());
             overlayMgr.AddOverlay(new FlashOverlay());
             overlayMgr.AddOverlay(new RadiationPulseOverlay());
+
             IoCManager.Resolve<IChatManager>().Initialize();
             IoCManager.Resolve<ISandboxManager>().Initialize();
             IoCManager.Resolve<IClientPreferencesManager>().Initialize();