PatrolAgent::getRobotPose returns 0 for yaw.

[agoeckner]

PatrolAgent::getRobotPose always returns 0 for yaw. This is performed intentionally as a workaround to the linker error below which occurs when attempting to use TF2 to convert quaternions to euler:

/usr/bin/ld: libPatrolAgent.a(PatrolAgent.cpp.o): in function `tf2::impl::toQuaternion(geometry_msgs::msg::Quaternion_<std::allocator<void> > const&)':
PatrolAgent.cpp:(.text._ZN3tf24impl12toQuaternionERKN13geometry_msgs3msg11Quaternion_ISaIvEEE[_ZN3tf24impl12toQuaternionERKN13geometry_msgs3msg11Quaternion_ISaIvEEE]+0x2f): undefined reference to `tf2::fromMsg(geometry_msgs::msg::Quaternion_<std::allocator<void> > const&, tf2::Quaternion&)'

Issue in question is located here: https://github.com/NU-IDEAS-Lab/patrolling_sim/blob/feature/ros2_sim_env/src/patrol_algorithms_base/src/PatrolAgent.cpp#L490