Moved shaders to separate files

res/shaders/fragment.glsl

@@ -0,0 +1,5 @@
+#version 330 core
+out vec4 FragColor;
+void main() {
+    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+}

res/shaders/vertex.glsl

@@ -0,0 +1,6 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+void main() {
+   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}