Update examples to React Three Fiber 9.8.1

Run R3F v10 examples through the snapshot harness

Register plane-crash in the website's example catalog

Add plane-crash postprocessing example

Upgrade three 0.165.0 -> 0.186

Two shots one picture: count loads per URL, wait for the physics worker and the second take

Add inverse kinematics example

Add N8AO postprocessing example

Add ASCII postprocessing example

Postprocessing examples

A tag is a filter now, so the vocabulary is closed

The explainer rollout

Write two explainers through the passes that had never run

Describe eight examples chosen to break the contract

Put the explanation in the README, and keep it from rotting

Make an empty description an error, with a list that only shrinks

Give an example an apis field, and take the notes away

Ask a model which example llms.txt sends it to

Put the description contract in a skill, not in a reviewer's memory

Rename build-catalog to build-llms, and stop claiming /catalog/

Filter by tag, and by more than one library

Take the Base UI build of the same shadcn style

The preview waits on the builds, not the tests

Bump actions/download-artifact from 6 to 8

Report the shot at the commit that has a branch

A visual change is Chromatic's to report, not this job's