Added ESP32 core 3.x error message
- Added sendSonyMSB(unsigned long data, int nbits) as a clone of sendSony(unsigned long data, int nbits) to be more consistent.
- Added sendSamsungMSB(unsigned long data, int nbits) as a clone of sendSAMSUNG(unsigned long data, int nbits) to be more consistent.
- Added ESP32 core 3.x error message.