Cron String Builder is a simple component for building the schedule string requried to run scheduled jobs. It can be dropped on any lightning page.
sf package create --name CronString --package-type Unlocked --path force-app sf package version create --package "CronString" --wait 10 --installation-key-bypass
Unlocked Packaging Workflow: https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_unlocked_pkg_workflow.htm
/packaging/installPackage.apexp?p0=<04t id>