I left "free speed" alone since that's the technical term for it. In
general, velocity is a vector quantity, and speed is a magnitude (i.e.,
a strictly positive value).
This PR also replaces the speed verbiage in MotorController with duty
cycle.
Fixes#8423.
#8626 needs to switch to using reflection to load the robot class. Do
that with this PR so it's separate.
Also, remove the duplicated main files from the template, and instead
fixup vscode to handle this properly.
Easier then the last one that put everything in a sub namespace. By
prefixing the name less things break, and intellisense will be less
confusing to new users during the transition.
