added deferred and mrt shaders

assets/shaders/deferred.frag

@@ -0,0 +1,24 @@
+#version 450
+
+layout(set = 0, binding = 0) uniform sampler2D positionTexture;
+
+layout(set = 0, binding = 1) uniform sampler2D normalTexture;
+
+layout(set = 0, binding = 2) uniform sampler2D albedoTexture;
+
+layout(set = 0, binding = 3) uniform sampler2D specularTexture;
+
+layout (location = 0) in vec2 inUV;
+
+layout(location = 0) out vec4 outColor;
+
+void main()
+{
+  vec3 fragPos = texture(positionTexture, inUV).rgb;
+  vec3 normal = texture(normalTexture, inUV).rgb;
+  vec4 albedo = texture(albedoTexture, inUV);
+
+  // outColor = vec4(fragPos, 1.0);
+  // outColor = vec4(normal, 1.0);
+  outColor = albedo;
+}