add windows build step

.github/workflows/build.yml

@@ -45,3 +45,20 @@ jobs:
         name: todd-mac
         path: build
 
+  build-windows:
+
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: make
+      run: make
+    - name: copy to build folder
+      run: |
+        mkdir build
+        cp ./todd.exe build/
+    - uses: actions/upload-artifact@v4
+      with:
+        name: todd-windows
+        path: build
+