Signed-off-by: Aditya aditya050995@gmail.com

🎉 New feature

Summary

Part of the feature : Supporting lunar DEMs and custom surfaces in spherical coordinates. Adds new fields surface_axis_equatorial and surface_axis_polar to spherical coordinates proto msg, allows new enums MOON_SCS and CUSTOM_SURFACE.

Test it

Added test cases.

Depends on

Checklist

[x] Signed all commits for DCO
[x] Added tests
[ ] Added example and/or tutorial
[ ] Updated documentation (as needed)
[ ] Updated migration guide (as needed)
[ ] Consider updating Python bindings (if the library has them)
[x] 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.

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Codecov Report

Merging #279 (598d30d) into main (783d087) will increase coverage by 0.14%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
+ Coverage   85.44%   85.59%   +0.14%     
==========================================
  Files          10       10              
  Lines         962      972      +10     
==========================================
+ Hits          822      832      +10     
  Misses        140      140

Impacted Files	Coverage Δ
src/Utility.cc	`82.56% <100.00%> (+0.27%)`	:arrow_up:

Continue to review full report at Codecov.

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gazebosim / gz-msgs

Allow moon and custom surfaces in spherical coords msg #279