Node.js version management with pnpm and pnpm version management with corepack

Using pnpm and corepack to manage both Node.js and pnpm versions.

Goals

ensure right Node.js version is used
ensure right package manager & package manager version is used, ie. if we use pnpm it should disallow use of yarn/npm and the version of pnpm used should be correct

use-node-version=18.15.0 in .npmrc to pin the Node.js version pnpm will use when invoked
preinstall script that enables corepack
- problem: npm i still works
- [failed] corepack enable npm yarn pnpm, would overwrite npm, yarn and pnpm with symlinks/shims, this would be useful so that npm ... and yarn ... get intercepted and error with Usage Error: This project is configured to use pnpm
  - however it looks like this only works on second run, the first npm i will work fine, the second will fail with the right error, so we need to find an alternative
- lint rule using check-file/filename-blocklist and eslint-plugin-json (in order to lint JSON files) that disallows package-lock.json in favour of a pnpm-lock.yaml
  - Rule:
```
 'check-file/filename-blocklist': [
     'error',
     {
         '{,}package-lock.json': '*pnpm-lock.yaml',
     },
 ],
```
  - ESLint invocation: eslint . --ext js,json
  - Error output:
```
1:2  error  The filename "package-lock.json" matches the blocklisted "{,}package-lock.json" pattern. Use a pattern like "*pnpm-lock.yaml" instead  check-file/filename-blocklist
```