[🚀 | Feature request]: Introduce a config file for libparsec

[FirelightFlagboy]

What you would like to accomplish

I would share the same configuration between the client and the CLI.
Currently they both use the same values (default) but that could change anytime.

How the feature should work

I would like to have a configuration file that allow to derive a libparsec::ClientConfig from.

I imagine that it should be stored in ~/.config/parsec3

Describe alternatives you have considered

No response