dep!: drop fs-extra for internal node:fs & bump node engine >=16.20.2

[erisu]

Platforms affected

n/a

Motivation and Context

Replace fs-extra for node internal fs package.

Description

• Remove fs-extra package
• Use node:fs and node:fs/promises
• Bump node engine requirement to >=16.20.2

Testing

• npm t

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.62%. Comparing base (c7d3dc0) to head (f1e5c75).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #266   +/-   ##
=======================================
  Coverage   83.62%   83.62%           
=======================================
  Files          14       14           
  Lines         519      519           
=======================================
  Hits          434      434           
  Misses         85       85           

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