file-utils merge command

[Vyvy-vi]

Description

bin/file-utils merge filename1.ext filename2.ext ...
This command should take a variable argument list containing filenames separated by spaces.

This should first check if all the files are legitimate and then it should merge them all in order into a single file.

For now, this should output the merged file to STDOUT, however, in a later iteration we would need to add a flag or argument that allows us to specify an output file.

Additional Information

(If you have any ideas about how to add an output file arg in a neat manner, feel free to ask).