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.

utilities/src/file_utils.c

@@ -247,24 +247,22 @@ rse_err_t file_write(const char* file_name, size_t bytes_count, char* buffer)
     return ret;
 }
 
-rse_err_t file_load_gltf(const char* file_name)
+rse_err_t file_load_gltf(const char* file_name, cgltf_data** data)
 {
     char real_path[MAX_PATH_LENGTH] = {0};
     rse_err_t ret = RSE_ERROR_NO_ERROR;
     cgltf_options options = {0};
-    cgltf_data* data = NULL;
 
     strncpy(real_path, file_name, MAX_PATH_LENGTH);
     if ((ret = file_append_full_path(real_path, MAX_PATH_LENGTH)) != RSE_ERROR_NO_ERROR) {
         return ret;
     }
 
-    if (cgltf_parse_file(&options, real_path, &data) != cgltf_result_success) {
+    if (cgltf_parse_file(&options, real_path, data) != cgltf_result_success) {
         SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Failed to parse GLTF data");
 
         return RSE_ERROR_INTERNAL_ERROR;
     }
 
-    cgltf_free(data);
     return ret;
 }