feat(config): allow env variables inside config

[buroa]

This will allow users to do things like setting AUTOBRR_API_KEY="heyo" and making the config like so:

  autobrr:
    host: http://localhost:7474
    apikey: ${AUTOBRR_API_KEY}

Which would get rendered to:

  autobrr:
    host: http://localhost:7474
    apikey: heyo

[zze0s]

That's pretty cool, didn't know it was so easy! 👍

[buroa]

Hey @s0up4200, when can we merge and cut a release? Thanks!

[s0up4200]

Hey @s0up4200, when can we merge and cut a release? Thanks!

Hey! Sorry, will make a new release tonight 👍