[examples] Add TimesliceRobot templates (#3683)

wpilibcExamples/src/main/cpp/templates/timesliceskeleton/include/Robot.h

@@ -0,0 +1,27 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <frc/TimesliceRobot.h>
+
+class Robot : public frc::TimesliceRobot {
+ public:
+  Robot();
+
+  void RobotInit() override;
+  void RobotPeriodic() override;
+
+  void AutonomousInit() override;
+  void AutonomousPeriodic() override;
+
+  void TeleopInit() override;
+  void TeleopPeriodic() override;
+
+  void DisabledInit() override;
+  void DisabledPeriodic() override;
+
+  void TestInit() override;
+  void TestPeriodic() override;
+};