Refactor assets and config directory

src_assets/linux/assets/shaders/opengl/Scene.frag

@@ -0,0 +1,14 @@
+#version 300 es
+
+#ifdef GL_ES
+precision lowp float;
+#endif
+
+uniform sampler2D image;
+
+in vec2 tex;
+layout(location = 0) out vec4 color;
+void main()
+{
+	color = texture(image, tex);
+}