Bug: Swapfile error when trying to open Cody while already having another cody open in another nvim instance of the same project.

[Arne Van Maele]

Steps to reproduce:

1. Open a file in 2 nvim instances
2. Open cody in the first, ask a random question.
3. Try to open Cody in the second, but fail with this error:
   

I think the fix could just be a warning message, as I can see how this is kinda a user error.
Not really important but thought I might as well make a quick issue.
I think this should be easy to reproduce, let me know if it's not 😄