feat(policy): 扩展命令并实现窗口迁移、 output/layout/binding_mode 切换功能

- command.h 新增 SEND_TO_WORKSPACE、SET_CURRENT_OUTPUT、SET_LAYOUT、SET_BINDING_MODE 四个命令类型及载荷
- policy.c 实现对应的 apply 逻辑，包含焦点转移、映射/取消映射副作用和 listener 通知
- plan.h 增加 quit/will_restart 标志，为后续优雅退出做准备
- binding.c 对重复设置同一 mode 增加短路返回

src/core/command.h

@@ -12,12 +12,16 @@ typedef enum command_type_t {
   ZDWM_COMMAND_WITHDRAW_WINDOW,
   ZDWM_COMMAND_CONFIGURE_WINDOW,
   ZDWM_COMMAND_CHANGE_WINDOW_STATE,
+  ZDWM_COMMAND_WINDOW_SEND_TO_WORKSPACE,
   ZDWM_COMMAND_WINDOW_SET_FLOATING,
   ZDWM_COMMAND_WINDOW_SET_STICKY,
   ZDWM_COMMAND_WINDOW_SET_MINIMIZED,
   ZDWM_COMMAND_WINDOW_SET_MAXIMIZED,
   ZDWM_COMMAND_WINDOW_SET_FULLSCREEN,
   ZDWM_COMMAND_SWITCH_WORKSPACE,
+  ZDWM_COMMAND_SET_CURRENT_OUTPUT,
+  ZDWM_COMMAND_SET_LAYOUT,
+  ZDWM_COMMAND_SET_BINDING_MODE,
 } command_type_t;
 
 typedef struct manage_window_command_t {
@@ -36,11 +40,30 @@ typedef struct window_state_change_command_t {
   window_state_request_action_t action;
 } window_state_change_command_t;
 
+typedef struct window_send_to_workspace_command_t {
+  window_id_t window;
+  workspace_id_t workspace;
+} window_send_to_workspace_command_t;
+
 typedef struct window_bool_state_t {
   window_id_t window;
   bool state;
 } window_bool_state_t;
 
+typedef struct set_current_output_command_t {
+  output_id_t output;
+} set_current_output_command_t;
+
+typedef struct set_layout_command_t {
+  workspace_id_t workspace;
+  layout_id_t layout;
+} set_layout_command_t;
+
+typedef struct set_binding_mode_command_t {
+  zdwm_binding_mode_id_t mode;
+} set_binding_mode_command_t;
+
+
 /**
  * @brief 非 owning 的命令值对象
  * @details
@@ -61,11 +84,15 @@ typedef struct command_t {
     only_window_data_t withdraw;
     configure_data_t configure;
     window_state_change_command_t state_change;
+    window_send_to_workspace_command_t send_to_workspace;
     window_bool_state_t floating;
     window_bool_state_t sticky;
     window_bool_state_t minimized;
     window_bool_state_t maximized;
     window_bool_state_t fullscreen;
     switch_workspace_command_t switch_workspace;
+    set_current_output_command_t current_output;
+    set_layout_command_t layout;
+    set_binding_mode_command_t binding_mode;
   } as;
 } command_t;