Add support for Atmega 32U4 (Arduino Leonardo/Micro)

[AnasMalas]

Self descriptive I would imagine. The 32U4 includes direct Serial over USB and timer 4 which are not available in the Uno, so it can be harder sometimes to simulate my code.

I didnt realize I cannot self label this as a feature request. Anyway, I must say wokwi is seriously and immensely cool. Now I dont have to look suspicious in a coffee shop with an Arduino :)

[urish]

Thanks for the kind words about Wokwi :-)

I opened this request for voting, let see how it goes!