[WIP] Add function to check if Pengwin booted with systemd

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

the next version of pengwin will be systemd enabled by default, so your task is first create a function in the commons.sh that checks if pengwin was booted with systemd like SYSTEMD PID = 1.

Then use that function in everyplace it worth. Pengwin-setup make many installers that start services using a script in /etc/profile.d but also they can enable a service. I want you to make the changes that work in both scenarios.

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