feat: add mimiclaw onboarding page.

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

main/display/display.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "esp_err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+esp_err_t display_init(void);
+void display_show_banner(void);
+void display_set_backlight_percent(uint8_t percent);
+uint8_t display_get_backlight_percent(void);
+void display_cycle_backlight(void);
+bool display_get_banner_center_rgb(uint8_t *r, uint8_t *g, uint8_t *b);
+
+#ifdef __cplusplus
+}
+#endif