This also makes the Gradle build work with JDK 17.
The extra JVM args in gradle.properties works around a bug with spotless
and JDK 17: https://github.com/diffplug/spotless/issues/834
PMD.CloseResource was ignored because it's almost always a false
positive, and there are many of them.
These enable more consistent use of synchronization across the
native libraries. Users can create Event and Semaphore primitives, but
in addition, libraries can set up any handle as an Event-type signal.
The standard Java package is missing BooleanConsumer as well as Float classes.
Update SendableBuilder to use it instead of internal BooleanConsumer
interface.
The non-NT portion has been moved to wpiutil.
The NT portion has been moved to ntcore (as NTSendable).
SendableBuilder similarly split and moved.
SendableRegistry moved to wpiutil.
In C++, SendableHelper also moved to wpiutil.
This enables use of Sendable from wpimath and also enables
moving several classes from wpilib to wpimath.
