Added shellckeck to workflo

Author: rimi-itk

.github/workflows/workflow-template.yaml

@@ -13,3 +13,14 @@ jobs:
           for f in $(find github/workflows/ -name '*.yaml'); do
             docker run --rm --volume "$PWD":/workdir mikefarah/yq "$f" > /dev/null
           done
+
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: arduino/setup-task@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - run: |
+          task lint:shell-script