I have somewhat customised vim to my needs what I would like to do would be to add a cheatsheet, documenting these customisations and other things I often forget to the vim help system.
I know that it can be extended by plugins is there another way to expand the vim help system? writing a plugin seems overkill for what I want to achieve.
Adding a help file is actually fairly easy: as documented in :help add-local-help, you plop it in ~/.vim/doc and then run :helptags ~/.vim/doc. That's (part of) what your plugin manager is doing for you when you install a plugin.
You can confirm its been added by running :help local-additions; all the local help files should be listed there.
If you need help writing help files, there is some advice in :help help-writing.
