[FEATURE] New pre-commit hook: Sorbet (Issue #825)

[fulf]

Introduction

This pre-commit hook runs the Sorbet type-checker.
More information about Sorbet here

Fixes #825

Requirements

Sorbet

Notes: not sure if this should be a pre-commit hook or pre-push hook to be honest.

[sds]

Thanks for all the effort!

[bmulholland]

Just stumbled upon this. One note is that sorbet runs across all cores by default, so parallelize should be false by default, I think?