I'd like to be able to tell people to run the following in the Datasette documentation to get started:

brew install datasette
datasette install datasette-upload-csvs
datasette data.db --create --root --open

This would give them a local Datasette instance with the ability to drag-and-drop CSV files directly into it.

Just one catch: I don't want to have to talk them through creating an empty SQLite database file. So I want to add a new --create option which means "If any of the database files passed on the command-line do not yet exist, create them".