Migrate from Rubocop to Standard

[markets]

StandardRB Ruby Style Guide, with linter & automatic code fixer

WHY?
https://github.com/testdouble/standard#why-should-i-use-ruby-standard-style

EXTRAS

• Migrate from Hound to GH Actions

[markets]

@thibaudgg not sure why the amoeba/standardrb-action failed 🤔, StandardRB Linter passes for me locally ✅

So for now, I just added the linter as an extra step calling manually bundle exec standardrb. We won't have comments reporting in pull requests, but this is fine for me too 😃 we can integrate an action later in case we miss them?

[thibaudgg]

@markets I would try to fix it, it's nice to have the comments directly in the pull requests.

Did you already try to fix the permissions? https://github.com/marketplace/actions/standardrb#common-issues

[markets]

Thanks @thibaudgg! Defining the permissions was the trick:

permissions:
  checks: write
  contents: read

[thibaudgg]

👍🏻

[thibaudgg]

Welcome! 🙌🏻