[Suggestion] Save servers

[TimothieGeulin]

Don't think that it's a big thing to do nor it is important but it might be nice to add.
The possibility to save server settings (IP, pseudo, pass, port, script) so you just have to go to your saved servers list and click on it instead of retyping the whole thing.

[TestRunnerSRL]

Reasonable suggestion. I originally wrong the bizhawk-co-op script not have any kind of IO, but it's not saving some files for the OoT coop. I might add this if I get around to working on this repo more, but it might be good if someone else made a PR for it.