Add option to load config from file

[mszostok]

Description

Add option to load config from file. Support both YAML and JSON files (detects dynamically). Configure options:

1. Enable loading style from environment variable via version.WithPrettyStyleFromEnv("ENV_NAME_FOR_FILE_PATH"),
2. Load a style file directly using Go function, version.WithPrettyStyleFile.

Reasons

It enables dynamic styling without the need to know/use Go.

[Kamsiy]

is anyone working on this? is this available to pick up?

[mszostok]

Hi, yes,

IMO we can also support only YAML in the first stage. Later we can "port" NewYAMLOrJSONDecoder :)

for loading the style configuration, you can take a look on https://github.com/charmbracelet/glamour#styles as they do exactly this :)

[Kamsiy]

sounds good, I'll take a look, sorry for the late responses