Add support for FreeRTOS

[Szelwin]

FEATURE REQUEST I think adding a checkbox for including FreeRTOS would be great.

Adding FreeRTOS manually is an inconvenience, there's a lot of tutorials, but if you wish to use them, you either can't use the project generator or have to spend a whole day setting this up.

I definitely can see how this could be an improvement. When I figure out how to add FreeRTOS to a generated project then I can try to add this functionality, but I'm no expert in Python.

[Rocketmagnet]

I'd love to see this feature added! Especially if there were some options, for example to select heap / static memory allocation.