Add install instructions as vim 8–style plugin?

[phlummox]

Would it be worth including instructions in the README on how to install this in plain Vim (versions >= 8)?

It would be nice if plain Vim users could know at a glance if this was supported.

I tried

mkdir -p ~/.vim/pack/plugins
cd ~/.vim/pack/plugins
git clone https://github.com/kaarmu/typst.vim.git

and this seemed to work, so I'm assuming it is supported.