Camera trigger demo

[WilliamLewww]

🎉 Camera trigger demo

Depends on:

• Camera trigger integration test gz-sim#1384
• Triggered Camera gz-sensors#194
• Triggered Camera sdformat#846

Summary

Created a demo for the triggered camera. The demo works the same as camera.launch.py but requires a trigger to publish the camera's information.

Test it

ros2 launch ros_ign_gazebo_demos triggered_camera.launch.py &
ros2 topic pub /camera/trigger std_msgs/msg/Bool "{data: true}" --once

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• 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.

[chapulina]

No new test failures, merging