* admin/nt/dist-build/emacs.nsi: set x64 registry keys

* admin/nt/dist-build/emacs.nsi: Add DisplayIcon, DisplayVersion, and
  Publisher values to the Uninstall registry key.

Copyright-paperwork-exempt: yes

Run "TZ=UTC0 admin/update-copyright".

This patch fixes various problems preventing this script from
working. The job of this script is to collect Emacs' dependanicies and
the (MSYS2/MinGW64) source archives for dependancies (including 2nd
etc. order dependancies) into zip archives.  GPL requires distributing such
archives (along with Emacs' own sources) when distributing GPL binaries.

Most principle of the changes is support for MSYS2 "w64" source archives
in zst format; previously this script assumed all sources were available
as tar.gz files.   Additionaly several DLLs are added to list of
required, including sqllite3 and tree-sitter.

In general this is a maintaince fix to ensure others have access to the
code used to create pretest (and, presumably release) version of Emacs
30.  Additional changes are required to progmatically identify changes
in Emacs' dependancies (e.g. after building a new Emacs binary for
distribution).  There is commented out code to this effect in the
changes I've installed which did work, for a brief period in time; I
suspect some changes in MSYS2 made it more difficult (or impossible?) to
invoke the MSYS2 shell (under which this python script must run) from
the MINGW64 (under which Emacs is built).  I may resort to a powershell
script as a way to orchistrate/invoke both MSYS2 and MING64 but I'm
currently still messing with a Makefile based approach (which would run
under MINGW64), in any event I believe we're all agreed this script
must interigate Emacs to create the "starting list" of dependancies to
include as a way to resolve this issue (missing/incorrect deps are
frequent source of broken binary releases).  (bug#65206)

Previously, the uninstaller would recursively, unconditionally, remove
the parent folder in which Emacs was installed (the folder selected by
when running the installer), into which the installer places a folder
named for the given release (e.g. emacs-30.1).  This was a problem
during uinstalation when the selected folder contained other versions of
Emacs the user did not wish to remove.  Additionally, deleting Start Menu
short-cuts did not work (bug#68756).

Some installer language now better reflects that users are not
required to "Accept" the GNU Public License in order to use (etc.)
Emacs (bug#67667).

Users selections related to where to create (or not create) Start Menu
shortcuts are no longer ignored. (bug#75013)

Emacs (as installed by the installer) can now be uninstalled via
Windows' Add/Remove Progrms Control Panel.

The uninstaller will now remove (empty) parent folders, both under
Program Files and (when creation of shortcuts is enabled) under the
select Start Menu location.

* src/json.c (Fjson__available_p): Remove.
* lisp/subr.el (json-available-p): Always return t.
* admin/nt/dist-build/build-dep-zips.py:
* configure.ac:
* doc/lispref/text.texi (Parsing JSON):
* java/INSTALL:
* java/org/gnu/emacs/EmacsNative.java (EmacsNative):
* lisp/term/w32-win.el (dynamic-library-alist):
* m4/ndk-build.m4 (ndk_INIT):
* msdos/sed1v2.inp:
* nt/INSTALL:
* nt/INSTALL.W64:
* src/Makefile.in:
* src/emacs.c (main):
* src/lisp.h:
Remove JSON configuration options and references to it and Jansson from
documentation and build files.
* etc/NEWS: Announce.