[GitHub Actions] Introduce Shellcheck to check bash code (#1018)

.github/workflows/shellcheck.yml

@@ -0,0 +1,25 @@
+name: Shellcheck
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+  schedule:
+    - cron: "5 1 * * *"
+
+jobs:
+  shellcheck:
+    name: Shellcheck
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Run ShellCheck
+      uses: ludeeus/action-shellcheck@master
+      with:
+        ignore_paths: >-
+          frontend
+          json