Use GitHub actions for CI

.github/workflows/build.yml

@@ -0,0 +1,29 @@
+name: Build ExternalLibrary
+
+on:
+  push:
+    branches: [ main ]
+    tags: [ 'v*' ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: windows-2022
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+    - run: where python
+    - run: gci env:* | sort-object name
+    - run: echo "${{ env.Python_ROOT_DIR }}"
+    - run: dir C:\hostedtoolcache\windows\Python\3.10.11\x64
+    - run: python -m pip install -e Python
+    - run: cmake --version
+    - run: cmake . -G "Visual Studio 17 2022" -Bcpp_build
+    - run: cmake --build cpp_build --config Release
+    - run: cpp_build\Release\ExternalLibraryTest.exe
+    - run: cmake . -G "Visual Studio 17 2022" -Bpython_build -DEXTERNAL_LANGUAGE=Python -DPYTHON_HOME="C:/hostedtoolcache/windows/Python/3.10.11/x64"
+    - run: cmake --build python_build --config Release
+    - run: python_build\Release\ExternalLibraryTest.exe