TODO comments about implementing interfaces.
Added the ResizeQueue type abbreviation.
Renamed the private 'consc' function to 'consCell' for clarity.
Minor cleanup: removed some unnecessary 'open' declarations and corrected some documentation comments.
Added documentation comments for all Queue members and Queue module functions/values.
Implemented members and functions for converting between Queue and ResizeQueue.
Renamed the Queue.enqueuef function to Queue.enqueueFront for clarity.
Added some TODO comments for future work.