add alias for acorn project cli

[keyallis]

Checklist

• The title of this PR would make a good line in Acorn's Release Note's Changelog
• The title of this PR ends with a link to the main issue being address in parentheses, like: This is a title (#1216). Here's an example
• All relevant issues are referenced in the PR description. NOTE: don't use GitHub keywords that auto-close issues
• Commits follow contributing guidance
• Automated tests added to cover the changes. If tests couldn't be added, an explanation is provided in the Verification and Testing section
• Changes to user-facing functionality, API, CLI, and upgrade impacts are clearly called out in PR description
• PR has at least two approvals before merging (or a reasonable exception, like it's just a docs change)

[StrongMonkey]

assuming we have syntax approval from leadership team

[ibuildthecloud]

This is kind of weird. Why proj?

[keyallis]

This is kind of weird. Why proj?

acorn p is too short to distinguish it from pull/push/ps and proj seems like the most logical shortening since it's just the first syllable.

[ibuildthecloud]

I still think it's weird. I think at that point I just use tab complete. I'm fine with it though. No real harm.