[core] Rename npm org name from @base_ui to @base-ui

[oliviertassinari]

Summary

The npm package convention is to use a dash to separate words, not an underscore. We used the underscore @base_ui because we didn't find a better option.

See mui/material-ui#43002 as an example of surprise:

Any reason why @base_ui scope is with an underscore? Feels a bit unusual for npm package naming and different to what we've been doing before with no obvious benefit. I personally find it to work particularly badly with underlines in urls (github, npm, docs,...)

I have flagged it as a breaking change as it's kind of one, but also doesn't have to be truly one.

Benchmark

npm packages with an underscore are not common: https://github.com/evanwashere/top-npm-packages

Options

We are working on gaining access to the @base-ui npm org name. Once we get it. We should be able to migrate to it. https://www.notion.so/mui-org/ops-Trademark-Base-UI-88f653d8a8b64cac96fa7546638ecc3d?d=24e76446683d430381fdd0a65c03e3d5

[michaldudak]

What's the point of having this as a GitHub issue? It's not actionable, as we've already contacted npm and can only wait until they resolve this. I can see a GH issue only when we actually own the org, to update the code.

[oliviertassinari]

What's the point of having this as a GitHub issue?

@michaldudak

1. There will be a pull request, which will close this issue.
2. As a developer, I might want to leave this feedback as it confuses me. Now, I can find more information about this frustration.
3. If this gets enough upvotes, I could see us prioritizing this change earlier than we would have had otherwise (same on the opposite side).