End-to-End Tests + Screenshot capability

[garrettmflynn]

This PR will use the data generated from #530 to run end-to-end tests using Puppeteer and automatically produce screenshots for a new tutorial on the GUIDE.

[garrettmflynn]

@CodyCBakerPhD Full end-to-end test is completed, including DANDI upload! Just have to tweak a few of the test timeout values so this works across all CI platforms.

[garrettmflynn]

Looks like it works! Let's collect some suggested improvements for these screenshots here then?

[CodyCBakerPhD]

including DANDI upload!

Just checking really quick - that's to staging, right?

[CodyCBakerPhD]

Let's collect some suggested improvements for these screenshots here then?

I would say having e2e tests at all is a fantastic thing to have; fine tuning of screenshots can always fall into a follow-up that specifically writes the tutorial

BTW, where are the screenshots found?

[garrettmflynn]

Just checking really quick - that's to staging, right?

Yep! It's to a hardcoded Dandiset that I made on staging. I've started passing my API key as an Action secret to support this behavior.

[garrettmflynn]

I would say having e2e tests at all is a fantastic thing to have; fine tuning of screenshots can always fall into a follow-up that specifically writes the tutorial

Sounds good!

BTW, where are the screenshots found?

Screenshots are placed in tests/screenshots at the moment, though this is ignored in the .gitignore file.

Do you want these to show up in the public repo?

[CodyCBakerPhD]

Do you want these to show up in the public repo?

I say let's decide that in the follow-up focusing on the tutorial specifically; will have to think about upsides/downsides

[CodyCBakerPhD]

Ahh, bummer: chromatic failing here https://github.com/NeurodataWithoutBorders/nwb-guide/actions/runs/7875721966