Define a standard place to track implementations in WG GitHubs

[tfpauly]

For example, that can be a wiki in a specific repo in a WG GitHub

[tfpauly]

This should be in WG chair control, to make sure it's not author responsibility (to choose which to list).

[tfpauly]

This should also be some boilerplate disclaimer that this isn't endorsed by the IETF LLC as a good implementation, etc, but rather is used for help in protocol development.

[mnot]

Is it a standard place (i.e., fixed location relative to root), or is it a standard way to find that place?

I'd prefer the latter, as some groups will want to use a wiki on a repo, others will publish a separate draft, etc.

[tfpauly]

I think it is most important to have a standard way to find the place. But, also, having some template/place that WGs can easily use by default would be nice (with variation of course expected and allowed).