Kainoa Kanter

Doesn't work, needs more testing.

@acid-chicken I'd personally like your feedback on this PR first if you don't mind, as you've been the most involved with Yarn Berry discussion.

Running `corepack enable` in the repo folder didn't change anything, is there a proper way to enable corepack?

> Can you confirm that deleting .yarn/releases/yarn-3.2.1.cjs with ["packageManager"](https://nodejs.org/api/packages.html#packagemanager) specified in package.json after running it still works? @acid-chicken yep!

Seems like the labeler bot adds back removed labels every commit ^^"

> Also, since Yarn berry has built-in monorepo management system called workspaces, so it would be great (and probably easy) to also improve the current situation, which is awkwardly realized...

Should I add `packages/*/yarn.lock` to `.gitignore`?

Also seems like removing `yarn-3.2.1.cjs` broke the linting workflows... 

Fixed (hopefully).

Seems like the current lint fails because of https://github.com/misskey-dev/misskey/blob/ebc2566130c785924380d504c76b270198bdc2c2/.github/workflows/lint.yml#L21-L22 causing  So hopefully it'll fix itself after this is merged.