fix(nixos-hosts): use arithmetic comparison in argument loop

Replaces `[[ $# > 0 ]]` with `(( $# > 0 ))` for clarity and correctness. This ensures improved readability and adherence to best practices in Bash scripting.

packages/nixos-hosts/nixos-hosts.sh

@@ -113,8 +113,7 @@ missing_opt_value() {
 	log_fatal "Option $1 requires a value"
 }
 
-# shellcheck disable=SC2154
-while [[ $# > 0 ]]; do
+while (( $# > 0 )); do
 	case "$1" in
 		-h|--help)
 			opt_help=true