Phase 4: Add GitHub workflow with SPM build matrix

- Updated iOS workflow with matrix build strategy
- Tests both CocoaPods and SPM dependency managers
- Ensures compatibility with both systems
- Added feature branch to workflow triggers

Author: ened

.github/workflows/permission_handler_apple.yaml

@@ -6,7 +6,7 @@ name: permission_handler_apple
 # events but only for the main branch
 on:
   push:
-    branches: [main]
+    branches: [main, feature/spm-support]
     paths:
       - "permission_handler_apple/**"
       - ".github/workflows/permission_handler_apple.yaml"
@@ -28,6 +28,10 @@ jobs:
     # should be moved back to `macos-latest` when GitHub Actions images are updated.
     runs-on: macos-15
 
+    strategy:
+      matrix:
+        dependency-manager: [cocoapods, spm]
+
     env:
       source-directory: ./permission_handler_apple
       example-directory: ./permission_handler_apple/example
@@ -57,7 +61,22 @@ jobs:
         run: flutter analyze
         working-directory: ${{env.source-directory}}
 
+      # Setup dependency manager
+      - name: Setup dependency manager
+        run: |
+          if [ "${{ matrix.dependency-manager }}" = "cocoapods" ]; then
+            cd ${{env.example-directory}}/ios
+            if [ -f Podfile.backup ]; then
+              cp Podfile.backup Podfile
+            fi
+          else
+            cd ${{env.example-directory}}/ios
+            if [ -f Podfile ]; then
+              mv Podfile Podfile.disabled
+            fi
+          fi
+
       # Build iOS version of the example App
-      - name: Run iOS build
+      - name: Run iOS build (${{ matrix.dependency-manager }})
         run: flutter build ios --no-codesign --release
         working-directory: ${{env.example-directory}}