It was found that you can also create new project with your original Manifests using ggsrun. By using this, for example, when you created new project, the project can have libraries, Advanced Google Services and so on at the initial stage. I think that this can be used as a template for Project.
$ ggsrun u -pn [Project name] -f appsscript.json
You can check this and download ggsrun at https://github.com/tanaikech/ggsrun.