automatically generate

further increases parity with
https://git.clan.lol/clan/clan-core/src/branch/main/nixosModules/clanCore/vars/interface.nix,
particularly:
-
f540ab91a1 (diff-7b681998bb14b48b80f83251424be17c6e3ce3bf)
-
19a251d6fc (diff-7b681998bb14b48b80f83251424be17c6e3ce3bf)
-
222915a9ed (diff-7b681998bb14b48b80f83251424be17c6e3ce3bf)

options.nix

@@ -84,17 +84,15 @@
                     };
                     owner = lib.mkOption {
                       description = "The user name or id that will own the file.";
-                      type = lib.types.str;
                       default = "root";
                     };
                     group = lib.mkOption {
                       description = "The group name or id that will own the file.";
-                      type = lib.types.str;
                       default = "root";
                     };
                     mode = lib.mkOption {
-                      description = "The unix file mode of the file. Must be a 4-digit octal number.";
                       type = lib.types.strMatching "^[0-7]{4}$";
+                      description = "The unix file mode of the file. Must be a 4-digit octal number.";
                       default = if file.config.group == "root" then "0400" else "0440";
                     };
                     deploy = lib.mkOption {