🚚 [shared] Added shared config that shared desktop config inherits from

shared/desktop/home-manager/shell/fish.nix

@@ -0,0 +1,55 @@
+{ pkgs, theme, ... }:
+
+{
+  catppuccin = {
+    fish = {
+      enable = true;
+      flavor = theme.flavor;
+    };
+    starship = {
+      enable = true;
+      flavor = theme.flavor;
+    };
+  };
+
+  programs = {
+    fish = {
+      enable = true;
+      # Start starship when creating a new shell
+      interactiveShellInit = ''
+        starship init fish | source
+        ${pkgs.fortune}/bin/fortune | ${pkgs.cowsay}/bin/cowsay -f tux
+      '';
+      plugins = [
+        {
+          # !! to get the previous command
+          # https://github.com/BrewingWeasel/fishbang
+          name = "fishbang";
+          src = pkgs.fetchFromGitHub {
+            owner = "BrewingWeasel";
+            repo = "fishbang";
+            rev = "50389667eb9ac79edcff9b987c83e1de8ac93921";
+            hash = "sha256-IneNWyfo29C7FDA5b6pTZRX3HpP6y/dRM6GXuLq2+zc=";
+          };
+        }
+      ];
+      shellAliases = {
+        nix-shell = "nix-shell --run fish"; # Start nix-shells using fish
+      };
+    };
+
+    starship = {
+      enable = true;
+      settings = {
+        directory.substitutions = {
+          "Documents" = "󰈙 ";
+          "Downloads" = " ";
+          "Music" = "󰓃 ";
+          "Pictures" = " ";
+          "Git" = " ";
+          "nextcloud" = " ";
+        };
+      };
+    };
+  };
+}