Seconding foam. You can still edit and navigate it using github/gitlab's UI, there are several functional mobile apps that work, and while not part of the offic

Seconding foam. You can still edit and navigate it using github/gitlab's UI, there are several functional mobile apps that work, and while not part of the official list it's trivial to get Zotero working nicely with it in both directions (embedding citations and going from citation to Zotero entry). The foam setup can also be used very nicely with non-git syncing methods like dropbox or syncthing if you prefer.