Improve workflow readability with matrix include for generator configuration

Co-authored-by: carsonRadtke <10507970+carsonRadtke@users.noreply.github.com>

Author: Copilot

.github/workflows/compilers.yml

@@ -84,6 +84,15 @@ jobs:
         build_type: [ Debug, Release ]
         toolset: [ '', 'ClangCL' ]
         cxx_version: [ 14, 17, 20, 23 ]
+        include:
+          # Regular MSVC builds use Ninja (from preset)
+          - toolset: ''
+            generator_override: ''
+            build_config_args: ''
+            test_config_args: ''
+          # ClangCL builds require Visual Studio generator
+          - toolset: 'ClangCL'
+            generator_override: '-G "Visual Studio 17 2022" -T ClangCL'
     runs-on: ${{ matrix.image }}
     steps:
       - uses: actions/checkout@v4
@@ -93,7 +102,7 @@ jobs:
         uses: ./.github/workflows/cmake
         with:
           cmake_preset: msvc-${{ matrix.cxx_version }}-${{ matrix.build_type == 'Debug' && 'debug' || 'release' }}
-          extra_cmake_configure_args: ${{ matrix.toolset != '' && format('-G "Visual Studio 17 2022" -T {0}', matrix.toolset) || '' }}
-          extra_cmake_build_args: ${{ matrix.toolset != '' && format('--config {0}', matrix.build_type) || '' }}
-          extra_ctest_args: ${{ matrix.toolset != '' && format('-C {0}', matrix.build_type) || '' }}
+          extra_cmake_configure_args: ${{ matrix.generator_override }}
+          extra_cmake_build_args: ${{ matrix.toolset == 'ClangCL' && format('--config {0}', matrix.build_type) || '' }}
+          extra_ctest_args: ${{ matrix.toolset == 'ClangCL' && format('-C {0}', matrix.build_type) || '' }}