feat: add mimiclaw onboarding page.

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

main/rgb/rgb.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+#include "esp_err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+esp_err_t rgb_init(void);
+void rgb_set(uint8_t r, uint8_t g, uint8_t b);
+
+#ifdef __cplusplus
+}
+#endif