Further automate package generation

[simbig]

Is your feature request related to a problem? Please describe.

A nice-to-have feature would be to further automate the setup of packages with this template and for example replace the initial Search & Replace with a script.

Describe the solution you'd like

One approach could be to use a php-script similar to https://github.com/spatie/package-skeleton-laravel/blob/main/configure.php