Home Assistant autodiscovery

• Nodes may register themselves on Home Assistant. Notice that EnigmaIoT gateway must be updated to this version to support this feature
• Added queue for ESP-NOW receiving messages
• Implement new features into "controller" examples
• Fix ESP32 wifi configuration to keep compatibility with esp8266 nodes. Force using 20MHz wifi channel.
• Added RSSI information for ESP-NOW packets
• Support for newer esp32 and esp8266 Arduino core