👷 add preview for docs

[guan404ming]

No description provided.

[jorenham]

This allows anyone to open a PR that would deploy anything they want to numpy.org. So that'd be a rather big security risk.

[jorenham]

in case you want to preview it locally, you can run uv run mkdocs serve, which is probably faster as well.

[guan404ming]

I opened this PR is for reviewer.

In most of web related repo (like https://github.com/shadcn-ui/ui, https://github.com/ant-design/ant-design), it would deploy the preview site for that PR where reviewer could easily review the code change toward UI. However, the preview site would be deployed only after the approval of the repo owner. (thus prevent the security issue). Also, some repo even have their preview domain to separate the production and staging env.

Do you think that it's needed here?

[jorenham]

Hm ok it might not be as bad as I thought. But still, it feel like the risks outweigh the benefit to me.