Request: support node version from .tool-versions file #36

We are currently using asdf to manage our node.js and ruby runtimes, which are specified in a .tool-versions file, and have a fair bit of tooling built which references this file. I'd like to swap over from corepack and actions/setup-node, but ideally without having to specify my node.js version in package.json. The node action allows:

with:
    node-version-file: ".tool-versions"

Would you consider something like this, to support such a file? (or .node-version or .nvmc for those using such files)