fix git interactive add diff editing

homes/jacek/cli/git/default.nix

@@ -9,6 +9,11 @@
             enable = true;
             userName = "jacekpoz";
             userEmail = "jacekpoz@cock.li";
+            includes = [
+                {
+                    contents = { core.editor = "${pkgs.neovim}/bin/nvim"; };
+                }
+            ];
         };
     };
 }