Add CMake build with MSVC to GitHub Action CI workflow

.github/workflows/ci_cmake.yml

@@ -63,6 +63,11 @@ jobs:
             cmake_defines: -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_FIND_ROOT_PATH=/usr/local -DCMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED=NO
             cmake_samples: OFF
             cmake_tests: OFF
+          - name: Windows MSVC
+            runner: windows-latest
+            cmake_generator: Ninja
+            cmake_samples: SOME
+            cmake_tests: CONSOLE_ONLY
 
     env:
       wxGTK_VERSION: ${{ matrix.gtk_version && matrix.gtk_version || 3 }}
@@ -74,6 +79,7 @@ jobs:
           submodules: 'recursive'
 
       - name: Set environment variables
+        shell: bash
         run: |
           wxPROC_COUNT=`./build/tools/proc_count.sh`
           if [ "${{ matrix.cmake_generator }}" == "Xcode" ]; then
@@ -100,6 +106,11 @@ jobs:
         run: |
           ./build/tools/before_install.sh
 
+      # required for CMake to find Ninja
+      - name: "[Windows] Set up MSVC Developer Command Prompt"
+        if: runner.os == 'Windows'
+        uses: seanmiddleditch/gha-setup-vsdevenv@v3
+
       - name: Configuring
         run: |
           cmake --version