* Limit CI
* Update msys2
* Declare msys packages for pkgconfig and fortran...
... with explicit DEPS and PROVIDES, instead of using DIRECT_PACKAGES.
This change makes it possible to notice changed dependencies
in `vcpkg-ci-msys2` update checks. (Current case: zstd.)
It also enables reuse of general declarations from `vcpkg_acquire_msys`
in specialized cases (`vpckg_find_fortran`).
Last not least, using the the Z_DECLARE_EXTRA_PACKAGES_COMMAND
simplifies the implementation of `vcpkg-ci-msys2`, in particular for
checks across platform boundaries.
* Revert "Limit CI"
* Extract vcpkg_extract_archive from vcpkg_find_acquire_program.
* Extract vcpkg_download_sourceforge from vcpkg_from_sourceforge.
This allows vcpkg_find_acquire_program to download from SourceForge without needing to temporarily change _VCPKG_EDITABLE.
* Use whether a URI is known for an entity to decide whether to downloads it rather than checking a separate supported_on_unix boolean.
* Add unparsed arguments check to vcpkg_extract_archive
* [vcpkg-ci-msys2] Add clangarm64 support
UCRT binaries for ARM64, built with clang.
* [vcpkg_find_acquire_program(PKGCONFIG)] Switch to pkgconf, add arm64
* CI
