feat: Add systemd service to auto-fetch Apple firmware and ensure its execution on first boot.

[RayBB]

We could run the get-apple-firmware automatically to pull the firmware instead of having the users run it manually.

One less step in the install process?

I haven't been able to test this yet but pushing up here to get early feedback.

Based on a brief discussion in the Discord

[AdityaGarg8]

LGTM if it works after testing

[AdityaGarg8]

My Mac has been sent for repair so I need someone to see this.

[AdityaGarg8]

Instead of cat <<EOF, I would prefer to curl it from https://raw.githubusercontent.com/t2linux/wiki/refs/heads/master/docs/tools/get-apple-firmware.service

this way in case we make any updates to the service, the same commit can be shared by Fedora and Ubuntu.

[RayBB]

I updated it to curl. I'm traveling the next 10 days so I'll have to check when I'm back unless someone else can test it.

[AdityaGarg8]

ExecStart=-/usr/libexec/get-apple-firmware -i get_from_macos

The systemd service is expecting the script to be in /usr/libexec/get-apple-firmware, but in Ubuntu I put it in /usr/bin.

[AdityaGarg8]

I'll change the path on ubuntu

[AdityaGarg8]

I'll change the path on ubuntu

Ok so I pushed a change to the apt repo which changes the path to /usr/libexec and symlinks it to original /usr/bin