build: ensure e2e apps run with proper node version

[davidlj95]

Currently, all E2E generated apps run under node version specified in .node-version of the repo

This triggers warnings when running Angular CLI compilation commands (y con razón)

We should somehow run the E2E apps with proper node version.

Fortunately, that info can be now retrieved by looking at engines.node in package.json of @angular/core package

However, it would require some work to generate a .node-version file with specific version. We first need to find latest version from the Node.js version semver: ^18.13.0 || >=20.9.0. We could grab something from setup-node GitHub Action code. Like getNodeJsVersions to get available versions and evaluateVersions to find the candidates

We could use a library like node-resolve-versions but it's not an official one, so maintenance risk there. Fortunately that one has activity from months ago.

Or we could just place the semver in the .node-version file. .node-version usage repo doesn't indicate if that is supported in many Node.js version managers. However, checked and it is actually supported in setup-node GitHub Action by reading code of it. n (which I use locally) does not though:

       found : /Users/davidlj95/Code/git/davidlj95/ngx/.node-version
        read : ^18.13.0 || >=20.9.0

  Error: invalid version 'auto'

We would have to see anyway also how to re-configure CI/CD pipeline to switch to that Node version after using another Node.js to run the script to create the sample app. Maybe is as easy as calling setup-node again.