No longer stores a temporary setpoint in PIDSubsystem, instead
immediately sending to PIDController. This fixes an issue where the
setpoint didn't take effect until the Subsystem Periodic method ran, and
could cause commands to finish early if they were scheduled after the
subsystem periodic method ran because it used the old setpoint.
This makes code easier to read and more consistent between C++ and Java.
Also update clang-format settings to always add a line break (even if no braces are used).
Improves the APIs for various prebuilt subsystems (PIDSubsystem, TrapezoidProfileSubsystem, ProfiledPIDSubsystem). Addresses #2128, and also changes the rather cumbersome getSetpoint API to a more intuitive setSetpoint one. Updates examples to match.