Add ability to remotely write code on the Romi

[TheTripleV]

From Discord:

@PeterJohnson : what I would really like to see is a rPi-hosted solution for code+sim+joystick input to a browser so people could code Romi's from a chromebook
@TheTripleV : So a vscode server on the pi that chromebooks can connect to for a full dev experience?
@PeterJohnson : that would be the dream yes. with simgui via browser support too

A way to approach this:

1. Install https://github.com/cdr/code-server and set it up to start on boot.
2. Install the Wpilib extension and find a java/cpp extension that works
3. Install xpra
4. Modify the sim gradle task for romi so it launches as xpra start --html=on --start-child=SIM_COMMAND
5. Create an html page that
   a. has an iframe of xpra's html page
   b. sends all data from the html5 gamepad api to the romi over ws