[2 lines] fix blinding (#9690)

* Adds blinding + blindfolds (#8688)

* Adds blinding + blindfolds

* Don't break examining lol

* moment

* fix toggle lights behavior

* move checks around

* Sloth review

* Added a salvage funny

* review

* woops

* Switch circle shader

Co-authored-by: wrexbe <wrexbe@protonmail.com>

* resolve merge conflict

Co-authored-by: wrexbe <wrexbe@protonmail.com>

Resources/Prototypes/Shaders/greyscale.yml

@@ -2,3 +2,8 @@
   id: Greyscale
   kind: source
   path: "/Textures/Shaders/greyscale.swsl"
+
+- type: shader
+  id: GreyscaleFullscreen
+  kind: source
+  path: "/Textures/Shaders/greyscale_fullscreen.swsl"