Prove a structured format for banned function settings

[Sigmanificient]

txt is an unstructured format which makes room for uncertainty.
Please provide a format such as JSON, toml, ini, ...

[Dawoox]

I think EFC should stick to the txt format at least for now because this project was made to be as accessible as possible.
As such a more structured format could confuse more novice users.
Furthermore I can't think of a use case that would require a more complex use case.