added git collaboration page

[ianmcgettigan]

I saw a great article on collaboration using Overleaf on this website. I wrote a quick article on using Git for the same purpose, as it has several advantages over Overleaf. If this is approved, I can add more, such as on resolving merge conflicts. Thank you.

[krzysztof99xd]

Hey @ianmcgettigan ,
Apologies for coming back late to you.
First of all, thank you for showing the interest in contributing to Tilburg Science Hub!

Regarding your contribution. I think there is already some content on using Git. Please see the links below:
Pull Requests: https://tilburgsciencehub.com/topics/Collaborate-share/Project-management/contribute-to-tilburg-science-hub/pullrequests/
Git strategies: https://tilburgsciencehub.com/topics/Automation/version-control/advanced-git/git-branching-strategies/

Therefore, I think that content from your article has been already covered on our website.
Maybe then you can change a little bit the idea behing your article? Something more specific about Git, Overleaf and Research? @hannesdatta do you have some ideas?