[Feature] Cache dependencies for all branches

[jackHedaya]

• I'd be willing to implement this feature
  Would need to familiarize myself with the yarn repo.
• This feature can already be implemented through a plugin
  Not sure

Describe the user story

It is frustrating when I change git branches and get a dependency error because I didn't yarn again.

Describe the solution you'd like

I think it would be very valuable for yarn to automagically keep track of which dependencies are needed for which git branch, pivoting whenever a branch is changed.

Describe the drawbacks of your solution

The drawbacks include storage issues (by keeping unused dependencies) and tracking the changes without reformatting yarn.lock.

Describe alternatives you've considered

A thought that occurred to me was a git hook (like husky) that runs yarn every time the branch is changed.

[arcanis]

Have you seen Zero-Installs?

[jackHedaya]

Just checked it out. Looks awesome! Definitely looking forward to Berry!