Feat: produce an .msi for windows CI

scripts/build-all.sh

@@ -322,6 +322,13 @@ copy_artifacts() {
         fi
     fi
 
+    # MSI installer for Windows targets
+    if [[ "$os" == "windows" ]] && command -v cargo-wix &>/dev/null; then
+        echo "    Building MSI installer..."
+        cargo wix --no-build --nocapture -C -p -C x64
+        cp target/wix/*.msi "$OUT/" 2>/dev/null && echo "    MSI -> $OUT/" || true
+    fi
+
     # AppImage for Linux targets
     if [[ "$os" == "linux" ]]; then
         if $build_cagire; then