Test building BridgeJSTool on macOS on CI

This exposes build errors on macOS that aren't reproducible on Linux.

Author: MaxDesiatov

.github/workflows/test.yml

@@ -70,6 +70,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6
+      - run: swift build --product BridgeJSTool
+        env:
+          DEVELOPER_DIR: /Applications/${{ matrix.xcode }}.app/Contents/Developer/
       - run: swift build --package-path ./Examples/Basic
         env:
           DEVELOPER_DIR: /Applications/${{ matrix.xcode }}.app/Contents/Developer/