Send logs of both JS game code and spade over serial for debugging purposes

[polypixeldev]

It would be helpful for game developers as well as spade developers if logs were sent over the serial connection to make it easier to debug problems that occur on the Sprig, such as parity problems or new firmware code. A serial monitor could be added to the Sprig editor to watch logs from your sprig game (although that is not part of spade).

[grymmy]

Hey @leomcelroy whaddya think about this one?

[polypixeldev]

It appears that both JS logs and spade logs are already sent over the USB! I was able to get them to show up in my terminal by running picocom -b 115200 /dev/ttyACM0 with the Sprig connected.
One thing is that we might want some clearer logs from spade to differentiate between JS and engine debug logs.

[ajs256]

Just prefixing the Spade and game logs with spade > and jerry > , respectively could work

[leomcelroy]

I support this suggestion on differentiating logs.