[hal,wpilib,wpimath] Add Usage Reporting for Choreo and PathWeaver (#7464)

wpimath/src/main/native/include/frc/trajectory/TrajectoryUtil.h

@@ -53,5 +53,9 @@ class WPILIB_DLLEXPORT TrajectoryUtil {
    * @return the trajectory represented by the JSON
    */
   static Trajectory DeserializeTrajectory(std::string_view jsonStr);
+
+ private:
+  // Usage reporting for PathWeaver Trajectory instances
+  inline static int pathWeaverTrajectoryInstances = 0;
 };
 }  // namespace frc

wpimath/src/main/native/include/wpimath/MathShared.h

@@ -25,6 +25,7 @@ enum class MathUsageId {
   kController_PIDController2,
   kController_ProfiledPIDController,
   kController_BangBangController,
+  kTrajectory_PathWeaver,
 };
 
 class WPILIB_DLLEXPORT MathShared {