feat: add bus-off error handling in CAN error status register with error blinking loop

Software/CAN_Sensor/src/main.rs

@@ -429,6 +429,11 @@ async fn can_task(
             }
         }
 
+        // Check CAN error status register for bus-off condition
+        if hal::pac::CAN1.errsr().read().boff() {
+            blink_error_loop(info, warn, 3, 3).await; // Bus-off error
+        }
+
         while let Ok(mut frame) = CAN_TX_CH.try_receive() {
             match can.transmit(&mut frame) {
                 Ok(..) => {