Add Windows executable builds to the CI workflow.

.github/workflows/build.yaml

@@ -126,6 +126,50 @@ jobs:
           name: archives-${{ matrix.config.os }}-${{ matrix.config.arch }}
           path: new_release/*
 
+  windows-build:
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - { os: "windows-2022", arch: "x86_64", target: "x64" }
+          - { os: "windows-2022", arch: "x86", target: "x86" }
+        ocaml-compiler:
+          - 4.14.x
+    runs-on: ${{ matrix.config.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Fetch tags
+        run: git fetch --tags --force origin
+
+      - name: Install OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          architecture: ${{ matrix.config.target }}
+
+      - name: Install dependencies
+        run: opam install --deps-only --with-test --with-doc -y .
+
+      - name: Build release
+        run: |
+          mkdir -p new_release
+          $env:OUTPUT = "$PWD\new_release"
+          $env:TARGETOS = "windows"
+          $env:TARGETARCH = "${{ matrix.config.arch }}"
+          $env:VERSION = "$env:GITHUB_REF_NAME"
+          opam exec -- bash release/release.sh
+        shell: pwsh
+
+      - name: Upload archives
+        uses: actions/upload-artifact@v4
+        with:
+          name: archives-windows-${{ matrix.config.arch }}
+          path: new_release/*
+
   release:
     if: startsWith(github.ref, 'refs/tags/')
     needs: [linux-build, mac-build]