feat: use Differential ShellCheck directly

.github/workflows/ci.yaml

@@ -8,10 +8,21 @@ on:
   workflow_dispatch:
 
 jobs:
-  general_ci:
-    uses: voxpupuli/crafty/.github/workflows/general_ci.yaml@main
-    with:
-      shellcheck_scan_dir: '.'
+  shellcheck:
+    name: 'Shell Check'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Differential ShellCheck
+      uses: redhat-plumbers-in-action/differential-shellcheck@v5
+      with:
+        scan-directory: |
+          ./docker-entrypoint.d/
+          ./scripts/
+        token: ${{ secrets.GITHUB_TOKEN }}
+
+
 
   build_test_container:
     name: 'Build test container'