ci: Add Windows to the CI builds.

Author: microbit-carlos

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         # macos-13 is x86_64, and macos-14 is arm64
-        os: [ubuntu-22.04, macos-13, macos-14]
+        os: [ubuntu-22.04, windows-2022, macos-13, macos-14]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     name: build.py ${{ matrix.os }}
@@ -25,12 +25,13 @@ jobs:
       - uses: carlosperate/arm-none-eabi-gcc-action@v1
         with:
           release: 10.3-2021.10
-      - name: Install CMake v3.22 via PyPI
-        run: python -m pip install cmake==3.28.3
+      - name: Install CMake v3.22 & Ninja v1.11 via PyPI
+        run: python -m pip install cmake==3.28.3 ninja==1.11.1.1
       - name: Check Versions
         run: |
           arm-none-eabi-gcc --version
           cmake --version
+          ninja --versio
           python --version
           uname -a
       - name: Build mpy-cross