Update change detection output handling and build/test conditions

- Refactored the output handling for change detection
- Modified build and test conditions based on changes detected

.github/workflows/main.yaml

@@ -13,7 +13,7 @@ jobs:
     permissions:
       pull-requests: read
     outputs:
-      change_detection_src: ${{ steps.change_detection.outputs.src }}
+      change_detection: ${{ steps.change_detection.outputs }}
     steps:
 
       - name: checkout
@@ -37,22 +37,22 @@ jobs:
               - 'playground/**'
 
       - name: build 
-        if: ${{ steps.change_detection.outputs.changes == 'true' }}
+        if: ${{ steps.change_detection.outputs.changes != '[]' }}
         uses: ./.github/actions/build
         with:
           configuration: Debug
           useVersioning: false
 
       - name: test 
-        if:  ${{ steps.change_detection.outputs.changes == 'true' }}
+        if:  ${{ steps.change_detection.outputs.changes != '[]' }}
         uses: ./.github/actions/test
 
   cd:
     name: CD
     runs-on: ubuntu-latest
     needs: ci
     if: >
-      needs.ci.outputs.change_detection_src == 'true' &&
+      needs.ci.outputs.change_detection.src == 'true' &&
       github.event.workflow_run.conclusion == 'success' && 
       github.event.workflow_run.event == 'push' &&
       (github.ref == 'refs/heads/main' ||