gbui 0.3.2

Releases carry binaries now, and the site has a page to get them from.

Added

• A shared library, the headers and the CMake package files, attached to
  every release — Linux x86-64, Windows x86-64, and both kinds of Mac. Unpack
  one, point CMAKE_PREFIX_PATH at it, and find_package(gbui) finds it;
  there is nothing else to install and nothing to build. A SHA256SUMS covers
  the set. Until now a release was a source tarball GitHub made for free, which
  is to say: build it yourself.

  They are built without the SDL2 backend, deliberately. A prebuilt library
  that links SDL2 needs the same SDL2 on the machine that loads it, and the
  version a distribution ships is never the version the runner had — so the one
  build that can be handed to a stranger is the one with nothing underneath it.
  Window::create returns nothing in these and every other part of the library
  is the same code. The alternative was a download that fails at load time on
  most machines, with a message about a shared object rather than about why.

  Three platforms, not four: macos-13 is retired, and a matrix entry naming a
  runner that no longer exists does not fail — it queues forever, and with
  needs: package the release never publishes. Intel Macs come back when there
  is a reason to add macos-15-intel.

  Each archive is consumed before it is allowed out: configured against,
  built against and run, on the machine that produced it, by
  tools/consumer. That is the check whose absence 0.3.1 was, and it now
  stands between a broken package and a published one rather than after it.

• A download page, in the nav and in the guide's first section. It reads
  the newest release from the GitHub API at run time rather than baking a list
  into a page that gets deployed once and then goes quietly stale, puts the
  visitor's own platform first, and falls back to the releases page when the
  API rate-limits — sixty requests an hour per address, and a visitor left on a
  spinner has been told nothing.

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Prebuilt libraries

A shared library, the headers and the CMake package files, for
each platform. Unpack one, point CMAKE_PREFIX_PATH at it and
find_package(gbui) finds it — the archive's README has the
three lines. Built without the SDL2 backend, because a
prebuilt library that links SDL2 needs the same SDL2 on your
machine; build from source if you want a window.

Verify with sha256sum -c SHA256SUMS.