Add Projector DOM

[iche033]

🎉 New feature

Summary

Add Projector DOM and tests.

I also added a new <visibility_flags> field to projector.sdf. This allows projections to be made visible only to cameras with matching visibility masks. One common use case is a depth camera with IR projection, in which the projected light / pattern is only visible to IR sensors in the depth camera device.

Test it

Run the INTEGRATION_projector_dom and UNIT_Projector_TEST

Checklist

• Signed all commits for DCO
• 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)
• 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 #1277 (c31f3aa) into sdf13 (486740e) will increase coverage by 0.08%.
The diff coverage is 96.71%.

❗ Current head c31f3aa differs from pull request most recent head 927a0c9. Consider uploading reports for the commit 927a0c9 to get more accurate results

@@            Coverage Diff             @@
##            sdf13    #1277      +/-   ##
==========================================
+ Coverage   87.72%   87.80%   +0.08%     
==========================================
  Files         126      127       +1     
  Lines       16585    16737     +152     
==========================================
+ Hits        14549    14696     +147     
- Misses       2036     2041       +5     

Impacted Files	Coverage Δ
src/Projector.cc	95.68% <95.68%> (ø)
src/Link.cc	98.18% <100.00%> (+0.18%)	⬆️

[scpeters]

just a few minor comments