Show changelog contribution count & GitHub profile on user page

[cl8n]

I got a few requests for this immediately after the github linking thing went live. there is a short discussion about it in the dev server: https://discord.com/channels/188630481301012481/188630616286167041/1165766213830447185 (tl;dr i couldn't figure out a way to display it that I was happy with, but I was probably overthinking it)