backend: X11 后端 window 信息查询接口使用原始封装代替语义化封装

- 拆分 window_get_skip_taskbar / window_get_urgency /
  window_get_states / window_get_geometry_mode 为更底层的
  window_get_atom_array / window_get_wm_hints / atom_to_window_state
- window_get_fixed_size 改为输出参数风格
- 扁平化 window_map_request_event_t，内联原 window_props_t 和
  window_geometry_t 的字段
- window_props_t → window_layer_props_t，仅保留 layer 分类所需的
  types/states

src/core/window.h

@@ -30,19 +30,13 @@ typedef enum window_state_t {
   ZDWM_WINDOW_STATE_STICKY,
 } window_state_t;
 
-typedef struct window_props_t {
-  window_id_t transient_for;
-
-  bool override_redirect;
-  bool skip_taskbar;
-  bool urgent;
-
+typedef struct window_layer_props_t {
   window_type_t *types;
   size_t type_count;
 
   window_state_t *states;
   size_t state_count;
-} window_props_t;
+} window_layer_props_t;
 
 typedef struct window_metadata_t {
   char *title;
@@ -51,9 +45,3 @@ typedef struct window_metadata_t {
   char *class_name;
   char *instance_name;
 } window_metadata_t;
-
-typedef struct window_geometry_t {
-  window_geometry_mode_t mode;
-  rect_t rect;
-  bool fixed_size;
-} window_geometry_t;