Add button counter test on GPIO22 with SoftSPI touch and LVGL.

Each press increments on-screen count; touch Reset clears. Flashable firmware/cyd package.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/button.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <stdint.h>
+
+void button_init();
+/** 轮询：检测按下边沿，返回本周期是否有一次有效按下 */
+bool button_poll_press();
+uint32_t button_count();
+void button_reset_count();
+bool button_is_down();