serde support for config data structures

[drHuangMHT]

Derive Serialize and Deserialize for Config structs and related data structures?
I do understand that some data structures cannot be serialized or deserialize. But could we make it happen with simple ones first?

[jxs]

yeah looks fine to me if do it as for example in gossipsub and feature gate it

[dariusc93]

What would your use case be for wanting to derive serde Serialize and Deserialize for the Config in libp2p vs making your own config that that derives those two with your own fields (besides just reducing redundancy)?

[drHuangMHT]

No more use case besides reducing redundancy. Not all fields can be serialized so I'm already doing it manually by copy-pasting. It is not very fun because I have to include the documentation as well.