https://github.com/ipfs/go-cid/pull/137/files is removing hardcoded mapping tables from go-cid,
and we need a replacement for people who will be migrating to go-multicodec

I want to document the best way way of doing string → code and code → string

My understanding is that:

Old way (go-cid)

cid "github.com/ipfs/go-cid"

// string → code
code := cid.Codecs["libp2p-key"]

// code → string
string := cid.CodecToStr[code]

New way (go-multicodec)

mc "github.com/multiformats/go-multicodec"

// string → code
var mc.Code code 
code.Set("libp2p-key")

// code → string
code.String()

@mvdan any thoughts if this is good enough?
Should we add StrToCodec and CodecToStr maps to go-multicodec, or is it not worth it?