chore: add shared and frontend skills

.agents/skills/playwright/scripts/playwright_cli.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if ! command -v npx >/dev/null 2>&1; then
+  echo "Error: npx is required but not found on PATH." >&2
+  exit 1
+fi
+
+has_session_flag="false"
+for arg in "$@"; do
+  case "$arg" in
+    --session|--session=*)
+      has_session_flag="true"
+      break
+      ;;
+  esac
+done
+
+cmd=(npx --yes --package @playwright/cli playwright-cli)
+if [[ "${has_session_flag}" != "true" && -n "${PLAYWRIGHT_CLI_SESSION:-}" ]]; then
+  cmd+=(--session "${PLAYWRIGHT_CLI_SESSION}")
+fi
+cmd+=("$@")
+
+exec "${cmd[@]}"