[1.0.6] New arenas, different layouts, new textures!

[fpetric]

Dear Teams,

to allow you to test your solutions in different environments, we have added two new arenas with different obstacle layouts, and to make detection of the tag more realistic, we have introduced textures to the arena. Make sure to pull new changes from both icuas22_competition and larics_gazebo_worlds repositories.

To see how to launch different arenas, check out the updated README, but the gist is to run the startup script with a number afterwards, for example ./start.sh 2 for the arena number two.