[test] add examples-check target with stubbed BIN and no-network validation for example scripts

scripts/with_flags.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# Wrapper that ensures --no-interaction -q are present, then delegates to the real BIN (stub by default)
+set -euo pipefail
+
+REAL_BIN=${REAL_BIN:-"$(dirname "$0")/bin_stub.sh"}
+
+# Append flags if not already present in args
+args=("$@")
+need_no_interaction=1
+need_quiet=1
+for a in "${args[@]}"; do
+  [[ "$a" == "--no-interaction" ]] && need_no_interaction=0
+  [[ "$a" == "-q" || "$a" == "--quiet" ]] && need_quiet=0
+done
+
+if [[ $need_no_interaction -eq 1 ]]; then
+  args=("--no-interaction" "${args[@]}")
+fi
+if [[ $need_quiet -eq 1 ]]; then
+  args=("-q" "${args[@]}")
+fi
+
+# Never read stdin; prevent accidental blocking by redirecting from /dev/null
+# Also advertise offline via env variables commonly checked by the app
+export CI=1
+export POLYSCRIBE_MODELS_BASE_COPY_DIR="${POLYSCRIBE_MODELS_BASE_COPY_DIR:-}" # leave empty by default
+
+exec "$REAL_BIN" "${args[@]}" </dev/null