Provide BepInEx install instructions rather than bundling

[dhnaranjo]

I think it'd be tidier, and consistent with most other mod releases, for you to point users to BepInEx's install instructions and have your archive just contain your own new work.

[laurence-myers]

That's a good idea. I've only tested it with one beta version of BepInEx, so I have no idea if other versions are compatible. I suspect some people would still prefer something that just works "out of the box".