What's the problem this PR addresses?

I often find myself doing the same things in every project I create, I figure some of them could be improved in yarn init.

How did you fix it?

• Widens the editorconfig configuration (otherwise it doesn't cover ts, tsx, jsx, css, less, etc).
• Add node_modules as a gitignored path, regardless whether we're in PnP mode or not.
• Add --deps and --dev-deps to add specific dependencies directly during the project init.

Checklist

• I have read the Contributing Guide.

• I have set the packages that need to be released for my changes to be effective.

• I will check that all automated PR checks pass before the PR gets reviewed.