Add basic loader for gltf

Added loading of avocado. Something is still wrong though,
becaus I cannot see the seed. But basic functionality is there.

red_scarf_engine/src/main.c

@@ -1,5 +1,7 @@
 #include "red_scarf_engine.h"
+#include "utilities/commons.h"
 #include "utilities/errors_common.h"
+#include "graphics/src/mesh_controller.h"
 
 int main(int argc, char** argv)
 {