Add an option to use ISO 8601 date string as migration name prefix

[jkazimierczak]

Kysely docs suggest to use ISO 8601 date string for prefixing migration names, as presumably this works better for larger teams. Citing the docs:

A date prefix works well in large teams where multiple team members may add migrations at the same time in parallel commits without knowing about the other migrations.

Source: https://kysely.dev/docs/migrations#execution-order

An toggle/flag option could be added to the create command. This can be done simply with just adding a condition to create.ts. I'm up for help and can submit a PR if you want.

[tmm]

Feel free to submit a PR!