Apple Silicon: Integrate Bootloader Support for Apple Silicon with m1n1 and u-boot

[NripeshN]

We need to set up a robust bootloader for Apple Silicon using a combination of m1n1 and u-boot. These two tools work well together and are already proven to function on Asahi Linux. This task will involve integrating them into our build pipeline and ensuring they align with our installer.

Ideas/Problems:

• Apple's bootloader is notoriously restrictive, but m1n1 simplifies things considerably.
• u-boot will work alongside m1n1 to provide a seamless booting experience.
• Ensure the bootloader integration doesn’t overcomplicate our installer setup or conflict with existing configurations.
• Coordinate with the Asahi Linux repos to leverage their groundwork while tailoring it for Bazzite.