repl: move `complete` to its own file
This PR moves a large function from repl.js into it's own file, internal/repl/complete.js. This is an attempt to slowly declutter the file.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This PR moves a large function from repl.js into it's own file, internal/repl/complete.js. This is an attempt to slowly declutter the file.