fix: Add missing bno055.h include to resolve implicit declaration warnings

Adds #include "bno055.h" to src/main.c to resolve implicit declaration
warnings for bno055_read(), bno055_calib_status(), and bno055_temperature().
Functions were properly implemented but header was missing from includes.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/main.c

@@ -15,6 +15,7 @@
 #include "i2c1.h"
 #include "bmp280.h"
 #include "mag.h"
+#include "bno055.h"
 #include "jetson_cmd.h"
 #include "jlink.h"
 #include "ota.h"