refactor: dry duplicated method

src/tmux_utils.sh

@@ -61,3 +61,9 @@ tmux_set_window_option_now() {
   _value="$2"
   tmux set-window-option -gq "$_option_name" "$_value"
 }
+
+# return the value of status style
+tmux_get_statusstyle() {
+  local _val=tmux show-option -gqv status-style
+  echo "$_val"
+}