Support volta.extends in node-version-file

[ThisIsManta]

Description:

Given the repository containing the below files

// package.json
{ "volta": { "node": "20.0.0" } }

and

// e2e/package.json
{ "volta": { "extends": "../package.json" } }

When the action is called with...

      - uses: actions/setup-node@v4
        with:
          node-version-file: e2e/package.json

Then it should result in Node.js v20.0.0 because this is how Volta works: https://docs.volta.sh/advanced/workspaces

But instead, I got the below error:

Justification:
If setup-node action claim to support Volta, then this extends field should be read and resolve into a concrete value of Node.js version as well.

Are you willing to submit a PR?
Yes, here you are: #921

[aparnajyothi-y]

Hello @ThisIsManta. Thank for a feature request. We will investigate it and share our results.

[ThisIsManta]

The PR has been merged. 🎉