feat(nixos): add host sops helper

configs/nixos/guests/valheim.nix

@@ -46,7 +46,7 @@ in
 
     passwordSecret = lib.mkOption {
       type = lib.types.str;
-      default = "services/valheim/password";
+      default = "services/game-servers/password";
       description = "SOPS secret name containing the Valheim server password.";
     };
   };

configs/nixos/modules/shell/fish/default.nix

@@ -103,6 +103,13 @@ in
             body = builtins.readFile ./functions/deploy-to.fish;
           };
 
+          sops-host = {
+            description = "Run sops with the host age key";
+            body = ''
+              sudo env SOPS_AGE_KEY_FILE=/var/lib/sops-nix/key.txt nix shell nixpkgs#sops -c sops $argv
+            '';
+          };
+
         };
 
         # Rendered by home-manager into ~/.config/fish/config.fish.