Improve joint controller world visualization

[ahcorde]

🦟 Bug fix

Fixes gazebosim/gazebo_test_cases#273

Summary

Visualization was very poor, you should move the camera around to check the joints, and it was really hard to see them because of the colors

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #2144 (205b9ca) into gz-sim8 (d052491) will not change coverage.
Report is 1 commits behind head on gz-sim8.
The diff coverage is n/a.

❗ Current head 205b9ca differs from pull request most recent head b4c2deb. Consider uploading reports for the commit b4c2deb to get more accurate results

@@           Coverage Diff            @@
##           gz-sim8    #2144   +/-   ##
========================================
  Coverage    65.45%   65.45%           
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  Files          323      323           
  Lines        30704    30704           
========================================
  Hits         20096    20096           
  Misses       10608    10608           

[mjcarroll]

Are there any tutorial images associated with this we need to update?

[ahcorde]

Are there any tutorial images associated with this we need to update?

Nope, it's just the sdf file