You could have a look at
source control but to a certain degree transferring files (or at least, information about the files) is sort of a requirement for working on a team.
If you're using Git specifically, I have some (currently unpublished) things that make changes in Scripts.rxdata visible to "git diff", "git grep", etc. Grep in particular I find very helpful.
I don't have any filters to help with automatic merging, so you'll have to either manually merge using the output of diff, or build those yourself.
If this sounds useful to you feel free to PM and we can try and get a release together. And possibly have a look at supporting maps, events, and so on too.