feat: deferred lighting (WIP)

res/shaders/effect.glslf

@@ -5,6 +5,7 @@ uniform sampler2D u_screen;
 uniform sampler2D u_position;
 uniform sampler2D u_normal;
 uniform sampler2D u_noise;
+uniform sampler2D u_ssao;
 uniform sampler2D u_shadows;
 
 uniform ivec2 u_screenSize;