Add Shellcheck support via GitHub Actions

Author: anavarre

.github/workflows/shellcheck.yml

@@ -0,0 +1,27 @@
+name: Run ShellCheck
+
+on:
+  push:
+    branches:
+      - '*'  # Run on all branches
+  pull_request:
+    branches:
+      - '*'  # Run on all branches
+
+jobs:
+  shellcheck:
+    name: Run ShellCheck
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Install ShellCheck
+      run: sudo apt-get install -y shellcheck
+
+    - name: Run ShellCheck
+      run: |
+        # Find all shell scripts and run shellcheck
+        find . -name "*.sh" -print0 | xargs -0 shellcheck
+