feat: add refresh-cache hook

[cristiand391]

DEPENDS ON: oclif/plugin-plugins#932

This PR adds a new refresh-cache hook that runs autocomplete create to regenerate autocomplete functions after installing or uninstalling plugins.

QA

1. checkout this PR and sf plugins link it
2. checkout this PR: feat: add plugins:post* hooks plugin-plugins#932 and sf plugins link it
3. enable completion: sf autocomplete and follow instructions
4. type sf org a<TAB>, see it doesn't suggest org api
5. install new plugin: sf plugins install @cristiand391/sf-plugin-api
6. open a new terminal pane (for zsh to source completion again) and repeat step 4, it should suggest org api options
7. uninstall plugin: sf plugins uninstall @cristiand391/sf-plugin-api
8. repeat step 6, shouldn't see org api completion.

@W-12465784@

[mdonnalley]

QA

Followed steps in description

🟢 installing new plugin refreshes autocomplete
🟢 uninstalling new plugin refreshes autocomplete