add macOS CI build

.github/workflows/macos.yml

@@ -0,0 +1,29 @@
+name: Build on macOS
+
+on: [workflow_dispatch, push]
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - name: Clone Project
+      uses: actions/checkout@v4
+
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v4
+      with:
+        version: 6.7.2
+
+    - name: Build Project
+      run: |
+        mkdir build
+        cd build
+        cmake ..
+        make -j3
+        macdeployqt build/sane-break.app -dmg
+    
+    - name: Create Artifact
+      uses: actions/upload-artifact@v4
+      with:
+         name: "Sane Break (macOS)"
+         path: ./build/sane-break.dmg