add jujutsu vcs

modules/common/shell/default.nix

@@ -7,6 +7,7 @@
     ./fzf.nix
     ./git.nix
     ./github.nix
+    ./jujutsu.nix
     ./nixpkgs.nix
     ./starship.nix
     ./utilities.nix

modules/common/shell/jujutsu.nix

@@ -0,0 +1,21 @@
+{ config, ... }: {
+
+  config = {
+
+    home-manager.users.${config.user}.programs.jujutsu = {
+      enable = true;
+      enableFishIntegration = true;
+
+      # https://github.com/martinvonz/jj/blob/main/docs/config.md
+      settings = {
+        user = {
+          name = config.home-manager.users.${config.user}.programs.git.userName;
+          email =
+            config.home-manager.users.${config.user}.programs.git.userEmail;
+        };
+      };
+    };
+
+  };
+
+}