rpi-kickstart 0.5.0

Added

• A bcm2712 feature, and a heap over all of a Pi 5's RAM. The
  feature names the chip, forwarding to rpi-hal's like bcm2711 does,
  and with it heap::init gives the allocator the board's RAM above the
  first gigabyte (rpi_hal::mem::high_ram_region) as well as the
  firmware's share below it: 8182 MiB on an 8 GB board, where it was 1014.

Changed

• rpi-hal 0.10 → 0.11 and rpi-hal-embassy 0.10 → 0.11. A
  consumer's own rpi-hal and rpi-hal-embassy must move with them,
  since their types cross this crate's API. The bcm2712 heap above
  needs 0.11's mem::high_ram_region.
• The heap is rlsf's TLSF driven directly, in place of
  embedded-alloc's wrapper of the same allocator, which takes one
  region where a Pi 5's heap is two. Same allocator, same heap::init
  and heap::usage; embedded-alloc is no longer a dependency.

Fixed

• storage::mount printed 512-byte clusters as "0 KiB". The mount
  line gave the cluster size in whole KiB, and 512 bytes, which the small
  FAT32 boot partition of a Raspberry Pi OS card uses, rounded down to 0.
  Sizes under 1 KiB are now printed in bytes.