Consider welcoming contributors

[katjam]

Description

What needs doing?

Prep this issue for work

• [ ] Review github guidance on making it easier for contributors to get involved and draft acceptance criteria from that (e.g. https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors)

[kimadactyl]

Prob be a good one for us to have a generic GFSC one - poss we could have a shared repo with the org-wide files and link out?

https://github.com/geeksforsocialchange/PlaceCal/issues/2551