But if you are not developing, it is more common to install plugins using json files. Do you want to install the plugin globally?
I want to know how, yes some plugins global like relink, markdown. I will keep researching. No need to answer here, or use a direct message and I will post a discussion when I have the details.
It does take some time to figure it out, I was confused here until I figured it out. The key is environment variables, and some knowledge of nodejs plugin development. Once you understand these, you can write plugins in any way, almost everything you see on a web browser