Support for microcontrollers

[Naheel-Azawy]

I tried compiling for Arduino

v-test> arduino-cli compile --fqbn arduino:avr:nano
/home/naheel/Arduino/v-test/v-test.ino:60:6: error: #error "The environment is not 32 or 64-bit."
     #error "The environment is not 32 or 64-bit."
      ^
/home/naheel/Arduino/v-test/v-test.ino:74:22: fatal error: sys/time.h: No such file or directory
compilation terminated.
Error during build: exit status 1

I suggest adding a compiler option to change int size. Also having a -o hello.ino option that automatically generate the loop() and setup() function would be so beneficial.
Or maybe make a new generator based on cgen? That would be better I think to support Arduino libraries. As you can see, time.h is not available.
If you have any other ideas to support microcontrollers other than Arduino sketches that is totally fine as well.

Note: I am aware of issue #609. But it was closed.