Adding support to customize the current window colors

+ Enabling the support to customize the current window fg/bg colors via
`@dracula-current-window-colors`
+ Enabling as well support to customize the inactivity fg/bg window
colors via `@dracula-window-colors`
+ This might be related with the issue #128

scripts/dracula.sh

@@ -26,6 +26,8 @@ main()
   time_format=$(get_tmux_option "@dracula-time-format" "")
   show_kubernetes_context_label=$(get_tmux_option "@dracula-kubernetes-context-label" "")
   IFS=' ' read -r -a plugins <<< $(get_tmux_option "@dracula-plugins" "battery network weather")
+  IFS=' ' read -r -a current_window_colors <<< $(get_tmux_option "@dracula-current-window-colors" "dark_purple white")
+  IFS=' ' read -r -a window_colors <<< $(get_tmux_option "@dracula-window-colors" "gray white")
   show_empty_plugins=$(get_tmux_option "@dracula-show-empty-plugins" true)
 
   # Dracula Color Pallette
@@ -244,14 +246,15 @@ main()
 
   # Window option
   if $show_powerline; then
-    tmux set-window-option -g window-status-current-format "#[fg=${gray},bg=${dark_purple}]${left_sep}#[fg=${white},bg=${dark_purple}] #I #W${current_flags} #[fg=${dark_purple},bg=${gray}]${left_sep}"
+    tmux set-window-option -g window-status-current-format "#[fg=${gray},bg=${dark_purple}]${left_sep}#[fg=${!current_window_colors[1]},bg=${!current_window_colors[0]}] #I #W${current_flags} #[fg=${dark_purple},bg=${gray}]${left_sep}"
   else
-    tmux set-window-option -g window-status-current-format "#[fg=${white},bg=${dark_purple}] #I #W${current_flags} "
+    tmux set-window-option -g window-status-current-format "#[fg=${!current_window_colors[1]},bg=${!current_window_colors[0]}] #I #W${current_flags} "
   fi
 
-  tmux set-window-option -g window-status-format "#[fg=${white}]#[bg=${gray}] #I #W${flags}"
+  tmux set-window-option -g window-status-format "#[fg=${!window_colors[1]}]#[bg=${!window_colors[0]}] #I #W${flags}"
   tmux set-window-option -g window-status-activity-style "bold"
   tmux set-window-option -g window-status-bell-style "bold"
+
 }
 
 # run main function