Add languages by filename

[EvieePy]

Description

Adds automatic language selection by filename. If filename does not resolve to a language, the current behaviour of determining the language by code will be used instead.

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
  • I have updated the changelog with a quick recap of my changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)
• I have read and agree to the Developer Certificate of Origin for this contribution

[EvieePy]

Added a small change to config, if someone could please review. It removes the need to set the domain in the config.