Update example screenshots, improve pinhole example, fix DisconnectedSpace docs

[Wumpf]

What

see title!
Also did some fixes to the screenshot checking utility.

• Fixes Update outdated example screenshots #6958
• Kept Disconnected space documentation incorrectly suggests reconnection is possible #7121 open, but addressed the doc issue

Ran pixi run -e py python ./docs/snippets/compare_snippet_output.py archetypes/pinhole_perspective to check whether changes pass comparison check

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

• PR Build Summary
• Recent benchmark results
• Wasm size tracking

To run all checks from main, comment on the PR with @rerun-bot full-check.

[github-actions]

Deployed docs

Commit	Link
900a4e1	https://landing-nvb8lrat5-rerun.vercel.app/docs