Onboarding checklist

[x] add to website
[x] add to core@scverse.org google group. Note: the email address used here will also get access to the shared google drive and calendars (see here)
[x] add to zulip
- [x] @core team
- [x] core-team private channel (see here)
[x] add to github org and scverse/core github team
[x] Send them link to core team handbook
[x] add to password manager
[x] Add to NumFOCUS slack
[ ] announce the new member on twitter
[ ] Grant "Leader" trust level on discourse

Welcome @timtreis!

scverse / governance