[templates] Add bindings to command-based template (#4838)

wpilibcExamples/src/main/cpp/templates/commandbased/include/subsystems/ExampleSubsystem.h

@@ -16,6 +16,14 @@ class ExampleSubsystem : public frc2::SubsystemBase {
    */
   frc2::CommandPtr ExampleMethodCommand();
 
+  /**
+   * An example method querying a boolean state of the subsystem (for example, a
+   * digital sensor).
+   *
+   * @return value of some boolean subsystem state, such as a digital sensor.
+   */
+  bool ExampleCondition();
+
   /**
    * Will be called periodically whenever the CommandScheduler runs.
    */