Create a new Security sub-team

[wolfv]

We want to bring Conda packages up to modern standards and implement features such as package signing via Sigstore.

For this purpose we want to start a Conda Security Subteam.

The purpose of this team is to define the specs for the implementation of package signing.

Going forward, the scope might be extended to include additional security related work.

[jezdez]

I'd say we should to solicit interested folks in this, I know Wolf and @Callek have recently talked, and @chenghlee has been interested in this as well.

[awwad]

Let me know if I can be of use.