feature request: hardcode-config board type by configuration in Sketch (e.g. #pragma config...)

[dsyleixa]

feature request:
as some programs are designed just for special arbitrary boards (e.g., Nano, SAMD, ESP) it would be helpful to hardcode-config the targeted board type by configuration in Sketch (e.g. #pragma config...) such as
#pragma config board="Nano"
#pragma config board="NODE_MCU 1.0"
#pragma config board="Adafruit Feather ESP32"

[per1234]

Closing as duplicate of arduino/arduino-ide#2438