Add UserCommands plugin to GPU lidar sensor example

[azeey]

🦟 Bug fix

Related to #2478

Summary

Adds the UserCommands to enable the transform tool.

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.00%. Comparing base (ab18888) to head (dc103ad).
Report is 84 commits behind head on gz-sim8.

Additional details and impacted files

@@             Coverage Diff             @@
##           gz-sim8    #2479      +/-   ##
===========================================
+ Coverage    65.75%   66.00%   +0.24%     
===========================================
  Files          327      328       +1     
  Lines        31233    31628     +395     
===========================================
+ Hits         20537    20875     +338     
- Misses       10696    10753      +57     

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