Adding install instructions for zinit to the readme

[ryaminal]

Simple PR with zinit instructions.

I attempted to get the autocomplete working with zinit but failed... Thought this was still valuable, though.

[vladdoster]

@ryaminal

Zinit has an actively maintained fork. I renamed the completion file so zinit will automatically install it. Additionally, it has a few other QoL improvements.

See the README installation instructions

zdharma-continuum/zunit

[ryaminal]

Huh, they do have a fork there. fascinating. Wonder why.
Guess it's time to close this PR. It's been hanging out here for a few years, long before the great upheaval in the zdharma/zinit ecosystem.

[vladdoster]

@ryaminal,

I created the fork and made all the changes, so here is some context.

1. Rename the completion file to _zunit to automatically get picked up by Zinit. See commit.

2. Change the log messages to make grokking test results easier.

3. Add new assertions specific to Zinit.

4. Make molovo/revolver an optional dependency because it added a ton of noise (thousands of lines) to the Github Action log output.

There are a few more things, but those are the four main reasons.