Create .uid files for detected new files

Author: KoBeWi

editor/editor_file_system.cpp

@@ -913,6 +913,12 @@ bool EditorFileSystem::_update_scan_actions() {
 						// Re-assign the UID to file, just in case it was pulled from cache.
 						ResourceSaver::set_uid(new_file_path, existing_id);
 					}
+				} else if (ResourceLoader::should_create_uid_file(new_file_path)) {
+					Ref<FileAccess> f = FileAccess::open(new_file_path + ".uid", FileAccess::WRITE);
+					if (f.is_valid()) {
+						ia.new_file->uid = ResourceUID::get_singleton()->create_id();
+						f->store_line(ResourceUID::get_singleton()->id_to_text(ia.new_file->uid));
+					}
 				}
 
 				if (ClassDB::is_parent_class(ia.new_file->type, SNAME("Script"))) {