feat: add config view for lvgl.

Signed-off-by: Bo <boironic@gmail.com>

main/ui/config_screen.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stdbool.h>
+
+void config_screen_init(void);
+void config_screen_toggle(void);
+bool config_screen_is_active(void);
+void config_screen_scroll_down(void);