feat(bar): 实现 bar 可见性切换 action

include/zdwm/action.h

@@ -31,6 +31,8 @@ typedef enum zdwm_action_type_t {
 
   ZDWM_ACTION_WINDOW_SEND_TO_WORKSPACE_SAME_OUTPUT_BY_INDEX,
   ZDWM_ACTION_WINDOW_CYCLE_OUTPUT,
+
+  ZDWM_ACTION_BAR_TOGGLE_VISIBILITY,
 } zdwm_action_type_t;
 
 typedef struct zdwm_action_data_spawn_t {

include/zdwm/config.h

@@ -5,6 +5,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <zdwm/action.h>
+#include <zdwm/bar.h>
 #include <zdwm/layout.h>
 #include <zdwm/listeners.h>
 #include <zdwm/rules.h>
@@ -206,6 +207,14 @@ typedef struct zdwm_api_t {
   );
 
   /** @} */
+
+  /** @name bar 配置
+   * @{ */
+  void (*set_bar_config)(
+    zdwm_config_builder_t *builder,
+    zdwm_bar_config_t config
+  );
+  /** @} */
 } zdwm_api_t;
 
 /**