Use export maps for defining package subpaths for efficient ESModules support

[trivikr]

Is your feature request related to a problem? Please describe.
Export maps improves efficiency for ES Modules customers, and help perform smarter optimizations for latest tools like Skypack. JS SDK v3 doesn't have export maps yet.

• Node.js docs: https://nodejs.org/api/packages.html#packages_subpath_exports
• Skypack docs: https://docs.skypack.dev/package-authors/package-checks#export-map

Describe the solution you'd like
Explore export maps to defined package subpaths.

Describe alternatives you've considered
Not exporing subpaths in ES Modules.

[github-actions]

Greetings! We’re closing this issue because it has been open a long time and hasn’t been updated in a while and may not be getting the attention it deserves. We encourage you to check if this is still an issue in the latest release and if you find that this is still a problem, please feel free to comment or open a new issue.

[trivikr]

New feature request at #2900

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.