Feature request: Add Yarn bin to PATH on Windows

[gustavodeon]

Right out of the gate, this is my first interaction on a public repository, so feel free to throw some feedback at me.

Basically i would like for corepack to automatically add the yarn's bin directory to path, so globally installed packages can be used from PowerShell | cmd without any hassle.

This is not a behavior on windows, can't test on different OS right now.

Perhaps when the corepack enable command is used this action could be triggered, so it doesn't make any unnecessary changes for those not using corepack.

[arcanis]

This would fall outside of Corepack's scope.