Metadata file generator script

[skelly37]

It would be useful to have some interactive script that would collect the needed data and generate the file with metadata based on them. Something like debtap; one enters name and some basic data, it does the rest.

• [ ] Interactive mode where one enters everything manually
• [ ] Script mode where one calls the script with flags like: ./generator.nu -u skelly37 -n package
• [ ] Add hash sums behind the scene
• [ ] Let the user ignore optional arguments, but force them to provide required ones (on OS we can assume [android linux macos windows]).