Working on basic rendering #4

* Added a basic material abstraction
* Started implementation of RenderTarget (such as render textures)

BarinkEngine/graphics/shaders/RenderSurfaceFrag.shader

@@ -0,0 +1,11 @@
+#version 440 core
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTexCoords;
+
+
+out vec2 aTexCoords;
+
+void main(){
+  gl_Position = vec4(aPos.xy , 0.0 ,1.0);
+  aTexCoords = aTexCoords;
+}

BarinkEngine/graphics/shaders/RenderSurfaceVert.shader

@@ -0,0 +1,11 @@
+#version 440 core
+out vec4 FragColor;
+
+in vec2 TexCoords;
+
+uniform sampler2D screenTexture;
+
+
+void main(){
+  FragColor = texture(screenTexture, aTexCoords);
+}