[command] Add ignoringDisable decorator (#4305)

wpilibNewCommands/src/main/native/include/frc2/command/Command.h

@@ -229,6 +229,14 @@ class Command {
    */
   virtual ConditionalCommand Unless(std::function<bool()> condition) &&;
 
+  /**
+   * Decorates this command to run or stop when disabled.
+   *
+   * @param doesRunWhenDisabled true to run when disabled.
+   * @return the decorated command
+   */
+  virtual std::unique_ptr<Command> IgnoringDisable(bool doesRunWhenDisabled) &&;
+
   /**
    * Schedules this command.
    *