test(clone-app): add aggregate test runner

plugins/clone-app/tests/run-all.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -uo pipefail
+HERE="$(cd "$(dirname "$0")" && pwd)"
+fail=0
+
+echo "=== bash tests ==="
+for t in "$HERE"/test-*.sh; do
+  echo "--- $(basename "$t") ---"
+  bash "$t" || fail=1
+done
+
+echo "=== python tests ==="
+for t in "$HERE"/test-*.py; do
+  echo "--- $(basename "$t") ---"
+  python3 "$t" || fail=1
+done
+
+echo
+if [[ "$fail" -eq 0 ]]; then echo "ALL TESTS PASSED"; else echo "SOME TESTS FAILED"; fi
+exit $fail