Update npm dependencies for docusaurus v3

[pavithraes]

Fixes #703

Description

This pull request:

• Updates package.json and package-lock.json to match @dcmcand's previous commit
• Tweaks to compile with MDX v3
• Misc updates to add code-block language reference

Pull request checklist

• [x] Did you test this change locally?
• [ ] Did you update the documentation (if required)? N/A
• [ ] Did you add/update relevant tests for this change (if required)? N/A

Additional information

• Merge #695 before this one, because the old sphinx docs will conflict with MDX v3.
• Add @dcmcand as a co-author because he originally figured out the correct dependencies.

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