chore: Refactor into a package

[lewisjared]

Description

• Moves the data request code out of the script into a package
• Adds some additional command line arguments

Checklist

Please confirm that this pull request has done the following:

• Data registry up to date (regenerate if necessary with a comment on this PR of /regenerate)
• Documentation added (where applicable)
• Changelog item added to changelog/

[lewisjared]

Closes #15