How to start Unity WITH asset packs / packages from the manager?

I have made some asset packs with my scripts that help me making games quickly.
But it’s really annoying to import it every time i open a new project.
Also i ALWAYS use ProBuilder and ProGrids which should be in unity as default for me.

There must be a way to get one default safe to have it all in there right?

To anyone following: It doesn’t work…

Unless you fumble around with the existing templates. I’ve found this article which explains how to bodge a custom template together.
Have a productive day everyone!