doc: note corepack package removal in distribution doc

[MikeMcC399]

Situation

The Node.js Technical Steering Committee completed a vote on Mar 19, 2025 which resulted in the strategy decision:

Phase out later: stop distributing Corepack (i.e. the distribution will no longer contain a corepack executable) on future (i.e. 25+) release lines of Node.js – existing release lines as well as the very next (i.e. 24.x) will keep it as experimental.

This is reflected in https://nodejs.org/docs/latest-v24.x/api/corepack.html, which states

Corepack will no longer be distributed starting with Node.js v25.

This distribution strategy change is however not yet mentioned in the Node.js Distribution Policy document.

Change

Add a corresponding comment to Node.js Distribution Policy document about the removal of the corepack module starting with Node.js v25.

[nodejs-github-bot]

Review requested:

• @nodejs/tsc

[MikeMcC399]

Preview

https://github.com/MikeMcC399/node/blob/corepack-removal-distribution-doc/doc/contributing/distribution.md

[MikeMcC399]

Since there was a request to add more history information, I've consolidated this instead into a new History section. I didn't originally think that the details of Corepack introduction should be listed in this policy document, however I see that there is some advantage to having the information about introduction and removal in one place.

Corepack was added to Node.js v14.9.0 and v16.9.0 (see https://nodejs.org/docs/latest-v25.x/api/corepack.html). It was never packaged into the v15.x release line.