feat: Allow caching global environment(s)

[olivier-lacroix]

@pavelzw , this PR brings back the option to cache global environments. To take into account your comment around the lack of lock file making this a bit more tricky, I have:

• modified the global cache key so that global caches expire at the end of each month, avoiding staleness issue
• created a separate setting to enable global caching, which defaults to false.

let me know what you think!

• Updated documentation in https://github.com/prefix-dev/pixi/blob/main/docs/integration/ci/github_actions.md as well

[pavelzw]

mostly looks good 👍🏻 feel free to create a pr to update the pixi docs as well.

can you bump the version in package.json to 0.9.2?

[olivier-lacroix]

mostly looks good 👍🏻 feel free to create a pr to update the pixi docs as well.

can you bump the version in package.json to 0.9.2?

Done. pixi PR is here: prefix-dev/pixi#4672

[olivier-lacroix]

@pavelzw thanks for your review and comments. I have actioned all of them.

The global cache will also cache the pixi binary. as the hash takes the binary into account, we should be fine, but maybe there is a way to do better, and skip pixi installation if it can be restored from the global cache? Any way, just a thought; and that could be done in a followup PR.

[olivier-lacroix]

@pavelzw gentle ping 😄 . the documentation has now been updated on the main pixi doc website.

[pavelzw]

sorry for the delay, your pings didn't reach me for some reason