Task 4 test worlds

[EAOZONE]

Description

Created the 3 different color buoy models as well as 6 different test cases for Task 4 - Wildlife Encounter.

Screenshot or Video

5 other test cases with different color orders

Related Issues

Closes #1263

Testing

To test this PR run this code in terminal roslaunch navigator_launch simulation.launch use_mil_world:=True world:=wildlife wildlife_encounter_test_case_1 the 1 can be changed to any number 1-6

About This PR

• [x] I have updated documentation related to this change so that future members are aware of the changes I've made.