Add Windows build job to release workflow

.github/workflows/flatpak-release.yml

@@ -53,3 +53,25 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           gh release upload ${{ github.ref_name }} H7CAD.flatpak --clobber --repo ${{ github.repository }}
+
+  build-windows:
+    runs-on: windows-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Upload exe to release
+        if: github.event_name == 'release'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release upload ${{ github.ref_name }} target/release/H7CAD.exe --clobber --repo ${{ github.repository }}