feat: add check for yarn 3

[c-ehrlich]

Add check for Yarn 3

• I reviewed linter warnings + errors, resolved formatting, types and other issues related to my work
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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This commit adds a warning when the CLI is run using Yarn 3. This is to alert the users of possible crashes as seen in #57.

I followed the format of #68 as it is a similar issue.

The .yarnrc.yml file is necessary so that the CLI doesn't crash before we can even check whether the user is on yarn 3. See chalk/chalk#531.

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Screenshots

(screenshot has a typo in it. i fixed it, but didn't want to create another screenshot as I had already uninstalled yarn 3. Hope that's ok)

[nexxeln]

Thank you.

We don't recommend any package manager, so you can change the message to this.

package manager such as npm, pnpm, or Yarn Classic.

Also can we link that issue in the warning?

[juliusmarminge]

I like this. Seems like a lot of people are running Yarn 3 and warning them pushing them onto another pkgManager seems like a good idea.

[nexxeln]

Looks good thank you!