Discussion: consolidating a linter within the project

I’m opening this discussion to consolidate in one place the conversation about the linter, as there have been discussions about code style spread across different packages

Some places where there has been discussion or an attempt to update or change standard/eslint:
- https://github.com/expressjs/serve-static/pull/171
- https://github.com/expressjs/serve-static/pull/172
- https://github.com/pillarjs/router/pull/118
- https://openjs-foundation.slack.com/archives/C02QB1731FH/p1724097077789059
- https://openjs-foundation.slack.com/archives/C02QB1731FH/p1723917697193729
- https://github.com/jshttp/content-type/issues/27
- https://github.com/expressjs/express/pull/6118
- https://github.com/expressjs/express/pull/6109