Two way communication in run mode.

[kjetilkjeka]

I needed to send some commands to the embedded target over serial. I found the path of least resistance was to extend bobbin-cli since I'm already using it for normal development. Feel free to use it, not use it, copy paste the code, request changes or commit directly to my repo (I've "allowed edits from maintainers") as you wish (or any other thing you might want to do with this PR).

I've only tested this with the JLink firmware but I would assume it works the same for other debuggers as well.

[kjetilkjeka]

@jcsoo

Have you had a chance to look at this?

Is there anything more i can do to make this feature happen?

[jcsoo]

Thanks for pinging me on this, I meant to take a look at this a while back and then got caught up in a lot of other stuff.

Overall it looks great. I just need build it and test it out myself.