To make sure only user-facing entities are included in the docs,
since access is public by default.
NB: the top-level access directive seems to work to hide index entrypoint files,
but in other cases (e.g. s2k submodules), exported functions may need to
manually be marked as private.
Also, the 'initialCommentsOnly' rule sometimes reports false positives
in case of multiple comment blocks separated by new lines. The solution
is to remove the new lines.
Mocha v10 requires the lib to be esm compliant.
ESM mandates the use of file extensions in imports, so to minimize the
changes (for now), we rely on the flag `experimental-specifier-resolution=node`
and on `ts-node` (needed only for Node 20).
Breaking changes:
downstream bundlers might be affected by the package.json changes depending on
how they load the library.
NB: legacy package.json entrypoints are still available.
