add windows action

.github/workflows/windows.yml

@@ -0,0 +1,31 @@
+name: CMake
+
+on:
+  push:
+    branches: [ test-windows ]
+  pull_request:
+    branches: [ test-windows ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    strategy:
+      matrix:
+        os: [ windows-latest ]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Download GmSSL
+      run: |
+        git clone https://github.com/guanzhi/GmSSL.git && \
+        cd GmSSL && git checkout tags/v3.1.1 && \
+        mkdir build && cd build && cmake .. && make && make test && make install 
+
+