fsprojects policy updates

Hi admins,

@sergey-tihon  and I have updated the policies we use for "fsprojects" to clarify things like when we would consider archiving a project, see https://github.com/fsprojects/fsprojects-admin/blob/master/README.md

We'd be grateful if you check you're ok with the policies and/or discuss here: https://github.com/fsprojects/fsprojects-admin/discussions/29

thanks