Change package titles to be scoped

[notlmn]

Fixes #1768

Changed all current package titles to be scoped, and fixed some doc issues along the way.

[babel-bot]

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[existentialism]

👍

[existentialism]

@notlmn thanks!

[nicolo-ribaudo]

We also need to update them in the tooling section in the left sidebar at https://deploy-preview-1770--babel.netlify.com/docs/en/next

[notlmn]

@nicolo-ribaudo Yeah, I also thought of that, but other parts of the docs have babel- prefix, and some don't. I was waiting to ask if the prefix should be removed (in id and in sidebar_label).

I'll submit a PR when I get back home.

[notlmn]

I've hit a wall while modifying the other fields, which may be a bug with Docusaursus, where it mixes up strings of all versions in the same file, causing the sidebar labels to be messed up (test repo).

I've reached out to the people at Docusaurus, the new PR may take a while.

[notlmn]

@nicolo-ribaudo The sidebar label change cannot be made as of now because of a bug in Docusaurus. I've opened an issue over at the Docusaurus repo.

The change can happen once the issue is resolved, or a workaround is to use different values for id (without the version-XX part) and sidebar_label in these docs to be different.

[nicolo-ribaudo]

Ok, we can wait then. Thank you for investigating!