Add active buzzer test with SoftSPI touch and LVGL.

GPIO22 digital on/off toggle (default off) and flashable firmware/cyd package.

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

include/buzzer.h

@@ -0,0 +1,5 @@
+#pragma once
+
+void buzzer_init();
+void buzzer_set_on(bool on);
+bool buzzer_is_on();