refactor: remove "error" reporting level, move reportMessage to logger

[Josh-Cena]

Breaking Change

• "error" reporting level is removed in favor of "throw"
• the reportMessage API (internal but maybe used by some?) has been moved/renamed

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

As discussed in #7615, removing the "error" reporting severity to avoid confusion for the users. I've actually been asked similar questions on Discord...

I took this chance to move reportMessage to logger, to make it appear more uniform, and also to take advantage of the interpolate function.

Test Plan

Test links

Deploy preview: https://deploy-preview-_____--docusaurus-2.netlify.app/

Related issues/PRs

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 70	🟢 100	🟢 100	🟢 100	🟢 90	Report
/docs/installation	🟠 82	🟢 100	🟢 100	🟢 100	🟢 90	Report

[github-actions]

Size Change: 0 B

Total Size: 801 kB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	52.6 kB
website/build/assets/css/styles.********.css	106 kB
website/build/assets/js/main.********.js	603 kB
website/build/index.html	38.9 kB

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[slorber]

ok 👍 let's give it a try

I'm not sure but I think some plugins might use the reportMessage function, so we'll see if anyone complains and we need to keep retrocompatibility

[Josh-Cena]

I'm not aware of any well-known ones using it.