ft: hyprland to home manager, mostly

modules/desktop/windowShaders/grey.glsl

@@ -0,0 +1,9 @@
+// Values obtained from: http://en.wikipedia.org/wiki/Grayscale#Luma_coding_in_video_systems
+vec3 LumaFactors = vec3(0.299, 0.587, 0.114);
+
+void windowShader(inout vec4 color) {
+  // Desaturate to luma only
+  float luma = dot(vec3(color.r, color.g, color.b), LumaFactors);
+
+  color.rgb = vec3(luma, luma, luma);
+}