feat: add nodejs toolchain

[hbjydev]

Changes

This MR adds a Node.js binary as a toolchain item to the languages package in the SDK. This will come with a small amount of support for NPM dependencies (prefetching & caching NPM dependencies).

Issues

• Only valid source hash is the ARM macOS download.
• The NPM CLI seems to be broken, pathing-wise. (Throws up an error about ../lib/cli.js not existing, though this could also be my system NodeJS conflicting with it, needs testing).
• Need a function to fetch NPM dependencies using the package-lock.json as a source to ensure dependency consistency.
• Need to then take that and npm pack the output.