Improve automation script

[BlueCutOfficial]

We have a first iteration of the automation script to sync with the latest English docs automatically. I was mainly focused on getting it to work, it could be cleaner:

• Abstract the usage of shell into a function
• Follow @GreatWizard's comments in Catch up latest docs: from 5.1 to 5.4 #215
• The script does not manage "new" files that have been correctly auto-applied because they didn't exist before (for example, typescript folder when upgrading from 5.1 to 5.4), these should not contain any diff.

EDIT: It's a lot better than before, there are 2 new comments to handle in #236:

• Use console.warn for errors that are not re-throw
• Use better tools to parse the script arguments

[BlueCutOfficial]

I rewrote everything with more modern syntaxes on a test repo, so I keep the issue open until I update.
See https://mainmatter.com/blog/2024/01/30/ember-guides-fr-git-automation/

[BlueCutOfficial]

I need to add a --no-verify in the commit command because modified English files are staged but are not expected to be added in .remarkignore, it makes the script fail for no reason.