feat(git): improve configuration

* configure diff
 * show diff when edit a commit in editor

modules/home-manager/cli/git/default.nix

@@ -68,6 +68,13 @@ in
           autoSetupRemote = true;
           default = "current";
         };
+        diff = {
+          algorithm = "histogram";
+          colorMoved = "plain";
+          mnemonicPrefix = true;
+          renames = true;
+        };
+        commit.verbose = true;
       };
     };
   };