Add bcachefs-tools

[kojq]

This is so bcachefs-tools (and btrfs-progs) can be used in the images (iso), should a user want to use those filesystems.

[QORTEC]

Build notes (bcachefs-tools):

• [ ] bcachefs still needs to be enabled in the linux-desktop kernel.

• [ ] need to package the dependency libsodium.

• [ ] remember to enable networking for cargo.

• [ ] there are build errors with the default toolchain, but it compiles with gnu.

• [ ] need to manually link gcc for the symbol __cpu_model.

  # Fixes: ld.lld: error: undefined symbol: __cpu_model
  export RUSTFLAGS="${RUSTFLAGS} -Clink-arg=-lgcc"

• [ ] build dependencies

  - pkgconfig(blkid)
  - pkgconfig(uuid)
  - pkgconfig(liburcu)
  - pkgconfig(libsodium)
  - pkgconfig(zlib)
  - pkgconfig(liblz4)
  - pkgconfig(libzstd)
  - pkgconfig(libudev)
  - pkgconfig(libkeyutils)
  - pkgconfig(udev)
  - name(libaio-devel)
  - binary(cargo)
  - binary(clang)