[wpilib] Add a few unit overloads (#8231)

Co-authored-by: Sam Carlberg <sam@slfc.dev>
Co-authored-by: Joseph Eng <91924258+KangarooKoala@users.noreply.github.com>
Co-authored-by: Tyler Veness <calcmogul@gmail.com>

wpilibc/src/main/native/cpp/Notifier.cpp

@@ -182,6 +182,10 @@ void Notifier::StartPeriodic(units::second_t period) {
   UpdateAlarm();
 }
 
+void Notifier::StartPeriodic(units::hertz_t frequency) {
+  StartPeriodic(1 / frequency);
+}
+
 void Notifier::Stop() {
   std::scoped_lock lock(m_processMutex);
   m_periodic = false;