* Add a realtime command detector
* Move `\r` as printable char and not replaced as `\n`
* Refactorize Serial service code to avoid redondant code between esp32 and esp8266
* Implement isrealtimeCommand check for serial and centralize function in string helper
* Add new type message : realtimecmd
* Update simulator to handle commands and realtime commands
* Add simple serial test tool
* Generate error if use HAS_DISPLAY with grbl/grblHAL
* Implement isRealTimeCommand for BT client
* Simplify BT push2buffer code
* Implement support for realtimecommand in telnet
* Implement isRealTimeCommand on websocket RX
* Simplify push2RXbuffer for websocket
* Implement isRealTimeCommand for USB serial
* Bump version
* Split esp32 code from esp8266 for Serial
* split receive serial message and processing serial message in esp32 in different task
* Make the esp32 code backward compatible with Arduino esp32 2.0.17 / IDF 4.4.7
