Move various "examples" into snippets. Several examples that were less
than a full mechanism or robot were moved to snippets. `arcadedrive` and
`tankdrive` were removed in favor of their Gamepad variants. `hidrumble`
was removed due to being too simple. `potentiometerpid` was removed
because of low utility. `gyromecanum` replaced `mecanumdrive` for
deduplication and because very few teams run holonomic drivetrains
without gyros.
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.
Adds snippets demonstrating ProfiledPIDController usage with
SimpleMotorFeedforward using the two-parameter calculate() method
(currentVelocity, nextVelocity).
These snippets will be used in frc-docs to document the recommended
feedforward pattern with ProfiledPIDController.
Co-authored-by: sciencewhiz <sciencewhiz@users.noreply.github.com>
This enables frc-docs to use RLIs for things that are currently in-line
code blocks, and ensures they compile, which is important with the 2027
breaking changes coming. They are kept separate from the examples to
ensure they don't polute the VSCode examples finder.
Adds the Encoder snippets used in the frc-docs Encoder article as the
first instance of this.
