Add checkbashisms and shellcheck as part of CI

.github/workflows/ii_wrapper.yml

@@ -9,6 +9,15 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    - uses: awalsh128/[email protected]
+        with:
+          packages: devscripts shellcheck
+    - name: Run checkbashisms
+      run: |
+        ./ci/run-checkbashisms.sh
+    - name: Run shellcheck
+      run: |
+        ./ci/run-shellcheck.sh
     - name: Set up Python 3.11
       uses: actions/setup-python@v5
       with:

ci/run-checkbashisms.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -e
+set -u
+
+find . \( -name '*.sh' -or -name iibot-ng \) -print0 | \
+    xargs -0 -- checkbashisms --newline --force --lint --extra

ci/run-shellcheck.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -e
+set -u
+
+find . \( -name '*.sh' -or -name iibot-ng \) -print0 | \
+    xargs -0 -- shellcheck