support VS 2026 generators (microsoft#48269)

Author: isanych

scripts/buildsystems/vcpkg.cmake

@@ -268,6 +268,10 @@ else()
         set(Z_VCPKG_TARGET_TRIPLET_ARCH arm64)
     elseif(CMAKE_GENERATOR STREQUAL "Visual Studio 17 2022")
         set(Z_VCPKG_TARGET_TRIPLET_ARCH x64)
+    elseif(CMAKE_GENERATOR STREQUAL "Visual Studio 18 2026" AND CMAKE_VS_PLATFORM_NAME_DEFAULT STREQUAL "ARM64")
+        set(Z_VCPKG_TARGET_TRIPLET_ARCH arm64)
+    elseif(CMAKE_GENERATOR STREQUAL "Visual Studio 18 2026")
+        set(Z_VCPKG_TARGET_TRIPLET_ARCH x64)
     elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin" AND DEFINED CMAKE_OSX_ARCHITECTURES)
         list(LENGTH CMAKE_OSX_ARCHITECTURES Z_VCPKG_OSX_ARCH_COUNT)
         if(Z_VCPKG_OSX_ARCH_COUNT EQUAL "0")

scripts/cmake/vcpkg_configure_cmake.cmake

@@ -42,6 +42,8 @@ function(z_vcpkg_get_visual_studio_generator)
             set(generator "Visual Studio 16 2019")
         elseif("$ENV{VisualStudioVersion}" VERSION_LESS_EQUAL  "17.99")
             set(generator "Visual Studio 17 2022")
+        elseif("$ENV{VisualStudioVersion}" VERSION_LESS_EQUAL  "18.99")
+            set(generator "Visual Studio 18 2026")
         endif()
     endif()