tutorials: Updated point_cloud_to_mesh tutorial to reflect new UI in CloudCompare 1.13.2

[peci1]

🦟 Bug fix

Summary

The UI of new versions of CloudCompare looks a bit different than in the tutorial. This PR updates it to the newest version available on flathub.

Also turned some PNG screenshots into JPEGs to save bandwidth.

It would make sense to backport this fix to all older distros as the tutorial suggests using CC from flathub.

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [x] 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.