Remove the notion of "sys*"

- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.

sysa/after.kaem

@@ -1,72 +0,0 @@
-#!/bin/sh
-
-# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
-# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
-# SPDX-FileCopyrightText: 2020-2022 fosslinux <fosslinux@aussies.space>
-# SPDX-FileCopyrightText: 2022 Dor Askayo <dor.askayo@gmail.com>
-#
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-set -ex
-
-PATH=/${ARCH_DIR}/bin
-
-# Set commonly used variables
-sysa=/sysa
-DISTFILES=/sysa/distfiles
-PREFIX=/usr
-BINDIR=${PREFIX}/bin
-LIBDIR=${PREFIX}/lib
-INCDIR=${PREFIX}/include/mes
-SRCDIR=${PREFIX}/src
-TMPDIR=/tmp # tmpdir is needed for patch to work
-
-mkdir -p ${PREFIX} ${BINDIR} ${LIBDIR} ${INCDIR} ${SRCDIR} ${TMPDIR}
-
-# Remove remaining dependencies on /bin (stage0-posix directory)
-cp /${ARCH_DIR}/bin/blood-elf ${BINDIR}/blood-elf
-cp /${ARCH_DIR}/bin/catm ${BINDIR}/catm
-cp /${ARCH_DIR}/bin/chmod ${BINDIR}/chmod
-cp /${ARCH_DIR}/bin/get_machine ${BINDIR}/get_machine
-cp /${ARCH_DIR}/bin/hex2 ${BINDIR}/hex2
-cp /${ARCH_DIR}/bin/kaem ${BINDIR}/kaem
-cp /${ARCH_DIR}/bin/match ${BINDIR}/match
-cp /${ARCH_DIR}/bin/M1 ${BINDIR}/M1
-cp /${ARCH_DIR}/bin/M2-Mesoplanet ${BINDIR}/M2-Mesoplanet
-cp /${ARCH_DIR}/bin/M2-Planet ${BINDIR}/M2-Planet
-cp /${ARCH_DIR}/bin/mkdir ${BINDIR}/mkdir
-cp /${ARCH_DIR}/bin/sha256sum ${BINDIR}/sha256sum
-cp /${ARCH_DIR}/bin/unbz2 ${BINDIR}/unbz2
-cp /${ARCH_DIR}/bin/ungz ${BINDIR}/ungz
-cp /${ARCH_DIR}/bin/untar ${BINDIR}/untar
-cp /${ARCH_DIR}/bin/cp ${BINDIR}/cp
-cp /${ARCH_DIR}/bin/replace ${BINDIR}/replace
-cp /${ARCH_DIR}/bin/rm ${BINDIR}/rm
-
-chmod 755 ${BINDIR}/blood-elf
-chmod 755 ${BINDIR}/catm
-chmod 755 ${BINDIR}/chmod
-chmod 755 ${BINDIR}/cp
-chmod 755 ${BINDIR}/get_machine
-chmod 755 ${BINDIR}/hex2
-chmod 755 ${BINDIR}/kaem
-chmod 755 ${BINDIR}/match
-chmod 755 ${BINDIR}/M1
-chmod 755 ${BINDIR}/M2-Mesoplanet
-chmod 755 ${BINDIR}/M2-Planet
-chmod 755 ${BINDIR}/mkdir
-chmod 755 ${BINDIR}/sha256sum
-chmod 755 ${BINDIR}/unbz2
-chmod 755 ${BINDIR}/ungz
-chmod 755 ${BINDIR}/untar
-chmod 755 ${BINDIR}/replace
-chmod 755 ${BINDIR}/rm
-
-PATH=${BINDIR}
-
-cd ${sysa}
-
-catm run2.kaem bootstrap.cfg run.kaem
-chmod 755 run2.kaem
-
-kaem --file run2.kaem