Epic

npm needs to start warning when it encounters config values that aren't defined. This is so folks are no longer surprised when they do things like npm install --loglevl.

This does also mean cleaning up the places we're still using undeclared config. We need to either define them, or formalize some way to have them ignored.

We also want to validate config values that are parsed from files. Currently only cli flag values are validated.

• [FEATURE] Add a handler for *unknown* options, analogous to invalidHandler nopt#41
• [BUG] config var "node-gyp" not respected in npm 7 cli#2839
• feat: use nodeGyp option run-script#230
• add node-gyp config, fix npm-version config warning cli#8129
• fix: re-add positional arg and abbrev warnings cli#8145
• Warn/error on unecessary config items in publishConfig #932
• Validate config from files #653 (moving this to a future project)
• fix: warn on invalid single-hyphen cli flags cli#8076
• fix: warn on invalid publishConfig cli#8078