- x13s: initialize bluetooth's public-addr, thus allowing BT to work
- linux-arm64-sc8280xp.config: enable per-core temperature sensors
- x13s: disable snapd.seeded service so boot won't hang if clock's < 2017
- x13s: back to steev's 6.3.y, since 6.4.y's audio drivers don't match alsa-ucm-conf
- add `GRUB_CMDLINE_LINUX_DEFAULT` with `efi=noruntime clk_ignore_unused pd_ignore_unused` so it actually boots
- use `grub-with-dtb` for the (required) DTB usage in grub
- use a customize hook to add a lot of modules & fw into initrd, required for booting
- if on RELEASE=lunar, add Ubuntu's "x13s Concept" PPA and a few packages for battery control/audio
