Add eslint-plugin-n to eslint config for node files

[gitKrystan]

Description

• Tweak .vscode/settings.json so that VSCode ESLint server finds TSConfig files as expected
• Add eslint-plugin-n to ESLint config for Node files
• Splits ESLint config for "config" type Node files (e.g. babel, eslint, rollup config files) from project Node files, which have slightly different rules
• Enables the --report-unused-disable-directives so that ESLint will error in that case
• Fixes all of the resulting lint errors
• Adds a VSCode task config for running pnpm lint and populating the VSCode Problems panel

Progress on #9041

Notes for the release