Add toolset detection for VS 2026. (#2063)

Author: Dimi1010

cmake/modules/PcapPlusPlusUtils.cmake

@@ -20,6 +20,8 @@ function(pcapp_detect_compiler TARGET)
       set(MSVC_YEAR "2019" PARENT_SCOPE)
     elseif(MSVC_TOOLSET_VERSION EQUAL 143)
       set(MSVC_YEAR "2022" PARENT_SCOPE)
+    elseif(MSVC_TOOLSET_VERSION EQUAL 145)
+      set(MSVC_YEAR "2026" PARENT_SCOPE)
     else()
       message(WARNING "Unsupported MSVC_TOOLSET_VERSION: ${MSVC_TOOLSET_VERSION}")
       set(MSVC_YEAR "2099" PARENT_SCOPE)