Add sscache to Windows CI

.github/workflows/windows.yml

@@ -8,6 +8,9 @@ on:
 
   release:
 
+env:
+  SCCACHE_GHA_ENABLED: "true"
+
 jobs:
   build:
     name: ${{ matrix.config.name }}
@@ -24,7 +27,6 @@ jobs:
             generators: "Visual Studio 17 2022"
           }
 
-
     steps:
       - uses: actions/checkout@v3
         with:
@@ -36,6 +38,7 @@ jobs:
           echo github.event.action: ${{github.event.action}}
           echo github.event_name: ${{github.event_name}}
           echo runner.os: ${{runner.os}}
+          Get-ChildItem Env:
 
       - name: Install libraries with vcpkg
         run: |
@@ -45,10 +48,18 @@ jobs:
         run: |
           type C:/vcpkg/packages/eigen3_x64-windows/debug/lib/pkgconfig/eigen3.pc
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/[email protected]
+
+      - name: Print sccache env
+        run: |
+          echo sccache version
+          sccache -V
+
       - name: Configure CMake
         run: |
           cmake --version
-          cmake -B ${{github.workspace}}/build  -G "${{matrix.config.generators}}" -A x64 -DBUILD_UNITTESTS=ON -DG2O_BUILD_EXAMPLES=OFF -DCMAKE_BUILD_TYPE=${{matrix.config.build_type}} -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake
+          cmake -B ${{github.workspace}}/build  -G "${{matrix.config.generators}}" -A x64 -DBUILD_UNITTESTS=ON -DG2O_BUILD_EXAMPLES=OFF -DCMAKE_BUILD_TYPE=${{matrix.config.build_type}} -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
 
       - name: Build Introspection
         run: |