refactor: reintroduce ssh agent

devc.sh

@@ -29,6 +29,9 @@ default_args() {
   # clipboard (wl-copy) and gui applications working.
   [ -e "/run/user/$UID/wayland-0" ] && arg "-v /run/user/$UID/wayland-0:/run/user/1000/wayland-0"
 
+  # Mount the ssh socket to get ssh working.
+  [ -e "$SSH_AUTH_SOCK" ] && arg "-v $SSH_AUTH_SOCK:/run/user/1000/ssh-auth-sock"
+
   # Make the user home dir a volume so it survives container
   # restarts. Use copy to keep the homedir files from the image.
   arg "-v $name:/home/user:copy"