Additional node.config.json "namespaces"

[pmarchini]

Since #58073, we've defined the concept of namespaces and introduced the first one, testRunner, in node.config.json.

I'm opening this issue to gather some feedback regarding the potential addition of other namespaces for different options, and to highlight this possibility.

For example, a "permissions" namespace could include options like --allow-addons, --allow-child-process, --allow-fs-read, etc.

Is this something that could provide value from a devEx perspective?

cc @nodejs/config

[marco-ippolito]

Cc @RafaelGSS