Switch to pydantic's BaseSettings for the config file?

[CasperWA]

Was there a reason we made our own config class rather than basing it off pydantic's BaseSettings

Originally posted by @shyamd in #134 (comment)

Link to pydantic documentation on the subject.

[shyamd]

Pros for switching to BaseSettings:

• default arguments for settings built into the model
• automatic validation of values built into the model
• easy to add new values - Only need to modify in one place
• Can modify settings with environment variables
• Consistent with the rest of the pydantic based model infrastructure

Cons:

• Basically lose the ini file as BaseSettings is designed for JSON files

[CasperWA]

I think this will be a good move - but is at the same time maybe medium priority at best? Losing the ini file is not a big issue for me, honestly. In my own implementation (based on this package) I use a JSON file.