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.

sysc/coreutils-8.32/patches/gperf_dependency.patch

@@ -1,50 +0,0 @@
-SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>
-SPDX-License-Identifier: GPL-3.0-or-later
-
-Remove dependency on gperf. This drops support for outputting unicode
-characters. We do that, because inclusion of unicodeio.h and propername.h
-from gnulib brings dependencies on gperf generated files. We don't have
-gperf at this stage so we can't regenerate them.
-
---- ./src/printf.c
-+++ ./src/printf.c
-@@ -59,7 +59,6 @@
- #include "die.h"
- #include "error.h"
- #include "quote.h"
--#include "unicodeio.h"
- #include "xprintf.h"
- 
- /* The official name of this program (e.g., no 'g' prefix).  */
-@@ -292,8 +291,12 @@ print_esc (const char *escstart, bool octal_0)
-           || (uni_value >= 0xd800 && uni_value <= 0xdfff))
-         die (EXIT_FAILURE, 0, _("invalid universal character name \\%c%0*x"),
-              esc_char, (esc_char == 'u' ? 4 : 8), uni_value);
--
--      print_unicode_char (stdout, uni_value, 0);
-+       putchar ('\\');                                                           
-+       if (*p)                                                                   
-+         {                                                                       
-+           putchar (*p);                                                         
-+           p++;                                                                  
-+         }  
-     }
-   else
-     {
---- ./src/system.h
-+++ ./src/system.h
-@@ -361,13 +361,13 @@ enum
- #include "version-etc.h"
- #undef emit_bug_reporting_address
- 
--#include "propername.h"
- /* Define away proper_name (leaving proper_name_utf8, which affects far
-    fewer programs), since it's not worth the cost of adding ~17KB to
-    the x86_64 text size of every single program.  This avoids a 40%
-    (almost ~2MB) increase in the on-disk space utilization for the set
-    of the 100 binaries. */
- #define proper_name(x) (x)
-+#define proper_name_utf8(x, y) (x, y)
- 
- #include "progname.h"
-