New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/shaders/GL/texturing.fsh.glsl

@@ -0,0 +1,11 @@
+uniform sampler2D u_colorTex;
+uniform float u_opacity;
+
+varying vec2 v_colorTexCoords;
+
+void main()
+{
+  vec4 finalColor = texture2D(u_colorTex, v_colorTexCoords);
+  finalColor.a *= u_opacity;
+  gl_FragColor = finalColor;
+}