Migrate from CommonJS to ECMAScript

[rafaelvieiras]

Node decide dropout CommonJs in 2013, so it's a good thing to change from CSM to ESM. It's better to develop, and can execute good practices.

https://en.wikipedia.org/wiki/CommonJS https://github.com/nodejs/node-v0.x-archive/issues/5132#issuecomment-15432598

I'm start to work on this for my issue #19 , most specific the server part of issue, to use multiple services (plex, emby, jellyfin).

I don't do a PR for now, but please, see this commit to have an idea: https://github.com/rafaelvieiras/pseudotv/commit/d531168dee158d10193b6c088314cb66f515000d