Use new @include preprocessor added to CyberarmEngin::Shader

shaders/fragment/default.glsl

@@ -1,20 +1,6 @@
 # version 330 core
-const int MAX_LIGHTS = 4;
-
-struct Light {
-  float end;
-  float type;
-  vec3 position;
-
-  vec3 diffuse;
-  vec3 ambient;
-  vec3 specular;
-
-  vec3 direction;
-
-  float intensity;
-};
 
+@include "light_struct"
 
 in vec3 outPosition;
 in vec3 outColor;
@@ -93,4 +79,4 @@ void main() {
   vec3 result = calculateLighting() * outColor;
 
   gl_FragColor = vec4(result, 1.0);
-}
+}