Support use-node-version from .npmrc

[NullVoxPopuli]

Documented here: https://pnpm.io/npmrc#use-node-version

example:

use-node-version=22.9.0

since .npmrc is not a leagcy file, it should be supported out of the box, with no flags, no .tool-versions required.

[1oglop1]

How do you imagine this could work?
use-node-version is specific to pnpm and .npmrc isn't defined as standard.
There would be a collision of who is supposed to manage the node version. It is up to you to decide if you are going to commit to asdf or pnpm. Combining both to manage the node version doesn't sound like a good idea to me.