feat(bar): 添加状态栏 bar 模块的基础架构和 workspace 指示器

src/bar/cell.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stddef.h>
+#include <zdwm/bar.h>
+#include <zdwm/types.h>
+
+size_t bar_cell_get_count(zdwm_bar_item_t *item);
+void bar_cell_set_count(zdwm_bar_item_t *item, size_t count);
+
+void bar_cell_set_text(zdwm_bar_item_t *item, size_t index, const char *text);
+void bar_cell_set_bg(zdwm_bar_item_t *item, size_t index, const char *color);
+void bar_cell_set_fg(zdwm_bar_item_t *item, size_t index, const char *color);
+void bar_cell_set_icon(zdwm_bar_item_t *item, size_t index, zdwm_icon_t icon);
+void bar_cell_set_indicator(zdwm_bar_item_t *item, size_t index, bool show);