feat: excluded shaders to seperate files for readiblity

sdf.fs

@@ -0,0 +1,9 @@
+R"###(  
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+} 
+)###";