Use the node: protocol when importing Node.js builtins

[MantisClone]

Motivation

• Makes it perfectly clear that the import is a Node.js builtin module. (Beginners don't always realize this)
• Makes the import identifier a valid absolute URL.
• Avoids conflicts for future Node.js builtin modules.

Definition of Done

• Enable ESLint Rule

Reference

• Use the node: protocol in docs examples nodejs/node#38343
• https://nodejs.org/api/esm.html#esm_node_imports