std/node: add url module

[EvanHahn]

For completeness, we should add a polyfill for Node's url module.

[aricart]

new URL() supporting proper parsing of any protocol would be sufficient.

[crowlKats]

subset of #3403

[EvanHahn]

@aricart I agree, though some folks might want to use std/node for Node compatibility.

@crowlKats Should #3403 be broken up into smaller issues like this one? Or should we close this one? I was following @bartlomieju's advice when I created this issue.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.