Use yarn v2 (berry) instead of yarn v1 (classic)

[trivikr]

Is your feature request related to a problem? Please describe.

It's not a problem, but this mono-repo setup uses yarn v1 (classic). The stable version of yarn v2 (berry) was released a year ago in Jan 2020 and yarn 3 is planned for 2021.

Describe the solution you'd like

Use yarn v2 (berry) instead of yarn v1 (classic), which has improved readability, plug-and-play and more.

Describe alternatives you've considered

Stick with yarn v1 (classic) as many users of npm ecosystem still use it.

Additional context

It can be done in a new repo, since this repo is tied with blog post series on Medium