* Convert build scripts from CommonJS to ES Modules
- Convert all eng/*.js files to ES Modules (.mjs)
- Update package.json scripts to reference .mjs files
- Fix ERR_REQUIRE_ESM error with vfile v6.0.3
- Add __dirname polyfills for ES Modules
* completing the migration of all files to es modules
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Co-authored-by: Lyubomir Filipov <lyubomir.filipov@jakala.com>
Co-authored-by: Aaron Powell <me@aaron-powell.com>
