If you want to automate the package migration process based on API executable commands. you need to create one new schema and expose two methods for export and import and then create JS to write logic for both functions
like for Import will be
a. Saving incoming request in schema for tracking
b. Retrieve the filename and folder value
c. create XML object using above details
d. use xtk.builder.InstallPackage function to install that XML
If Using API is not mandatory then use below link to design workflow which will export the package directly.