Noob in the browser - pyodide runner for the docs

[sneakers-the-rat]

so this is a somewhat big lift since we don't have any of the control built for local running yet, but i thought this would be so cool i wanted to go ahead with it maybe a bit prematurely.

so this basically does what it says! adds a pyodide runner to the JS code and hooks it into the docs so we can make all the docs examples actually run!

this is not written with perf in mind yet, when we get to an actual local runner we'll need to handle events a lot better than this so we don't end up serializing and then dropping like gigabytes of data that nobody requested to look at, but we'll get to that when we get there.

opening as a draft because i need to figure out some readthedocs things i think, but then once that's sorted the rtd preview should demo the feature.

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📚 Documentation preview 📚: https://noob--252.org.readthedocs.build/en/252/

[coveralls]

coverage: 83.14% (-0.07%) from 83.213% — pyodide-runner-2 into main

[codspeed-hq]

Merging this PR will not alter performance

✅ 8 untouched benchmarks
⏩ 8 skipped benchmarks¹

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_{Comparing pyodide-runner-2 (a85d916) with main (7acb004)}

Footnotes

1. 8 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩