Make ECP lint runner-compatible

scripts/ecp-lint.sh

@@ -28,7 +28,13 @@ check_pattern() {
   local file="$1"
   local regex="$2"
   local message="$3"
-  if ! rg -q --pcre2 "${regex}" "${file}"; then
+  local found=1
+  if command -v rg >/dev/null 2>&1; then
+    rg -q --pcre2 "${regex}" "${file}" && found=0
+  else
+    grep -Pq "${regex}" "${file}" && found=0
+  fi
+  if (( found != 0 )); then
     echo "ecp-lint: ${file}: ${message}" >&2
     errors=$((errors + 1))
   fi