Update for warehouse world

[hilary-luo]

Description

Updated all examples for positions that work in the warehouse world and added 2 examples:

Patrol example: Drives in a loop forever while monitoring battery charge. If the battery charge goes low then it will return to the base to charge.

Mail delivery example: Has a list of possible endpoints that are able to be selected from the user interface. The robot will be sent to the selected location.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Each tutorial was launched and run in the warehouse world.

# Start the humble sim
ros2 launch turtlebot4_ignition_bringup turtlebot4_ignition.launch.py rviz:=true nav2:=true localization:=true

# Select the line for the desired tutorial, the following are the new ones
ros2 run turtlebot4_python_tutorials patrol_loop 
ros2 run turtlebot4_python_tutorials mail_delivery

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation

The documentation update has been drafted but is pending this code review.

[roni-kreinin]

Don't use global namespace here.

[roni-kreinin]

Use navigator.info instead of print.

[roni-kreinin]

This is not a default python3 package. Let's avoid it and use input() instead.