feat: include macOS slice in Hermes xcframework

Add "macosx" to the create_universal_framework call so the published
Hermes xcframework includes a native macOS slice. The macOS framework
is already built by build-mac-framework.sh and placed in
destroot/Library/Frameworks/macosx/ — it just wasn't included in the
xcodebuild -create-xcframework step.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Saadnajmi

packages/react-native/sdks/hermes-engine/utils/build-ios-framework.sh

@@ -53,7 +53,7 @@ function build_framework {
 # group the frameworks together to create a universal framework
 function build_universal_framework {
     if [ ! -d destroot/Library/Frameworks/universal/hermes.xcframework ]; then
-        create_universal_framework "iphoneos" "iphonesimulator" "catalyst" "xros" "xrsimulator" "appletvos" "appletvsimulator"
+        create_universal_framework "macosx" "iphoneos" "iphonesimulator" "catalyst" "xros" "xrsimulator" "appletvos" "appletvsimulator"
     else
         echo "Skipping; Clean \"destroot\" to rebuild".
     fi