Add netip conversions to manet

[phillebaba]

The netip package has been around for a while in stdlib and build upon the original net package. Currently there are helper functions in the manet package that convert from and to net data types and multi addresses.

https://pkg.go.dev/github.com/multiformats/[email protected]/net#ToIP
https://pkg.go.dev/github.com/multiformats/[email protected]/net#FromNetAddr

It would be nice to expand on these functions and add support for netip data types along side the existing functions.