Implement environmental lookup sensors.

[arjo129]

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🎉 New feature

Supercedes #1660.

Summary

Implements a lookup sensor for environmental data.

Test it

You can run the example world:

gz sim environmental_sensor.sdf

Then listen on the main topic:

gz topic -e -t /world/environmental_sensor_test/model/model_with_sensor/link/link/sensor/custom_sensor/environmental_sensor/humidity

Press play, you should see the sensor go from 80%-90% humidity within a second and then stopping.

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)
• [ ] codecheck passed (See contributing)
• [x] 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[bot]]

Codecov Report

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:exclamation: Current head 0942c2e differs from pull request most recent head 0d67038. Consider uploading reports for the commit 0d67038 to get more accurate results

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[hidmic]

Most review comments still apply here @arjo129.

[arjo129]

OK looks like I dont know how to use git :man_facepalming: - I accidentally pushed all the fixes to #1748. Working on backporting :skull_and_crossbones:

[arjo129]

On second thoughts it'll be faster to review #1748 straight away.