Add incremental_logging example

[teh-cmc]

Showcases how to incrementally log data belonging to the same archetype, and re-use some or all of it across frames.

Turns out the first thing I immediately wanted was clamping-edge semantics 🥲

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 newly built examples: app.rerun.io
  • Using examples from latest main build: app.rerun.io
  • Using full set of examples from nightly build: app.rerun.io
• 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!

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[github-actions]

Size changes

Name	main	5462/merge	Change
incremental_logging.rrd	(none)	0.0 MiB	+100%

[Wumpf]

great addition!