feat: add playwright-ephemeral skill for ephemeral browser provisioning

Adds a new skill that provisions ephemeral Playwright MCP browser
sessions as Kubernetes Jobs for E2E testing. Includes provision and
teardown scripts, K8s Job/Service YAML templates, and agent-facing
SKILL.md documentation.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

playwright-ephemeral/scripts/teardown.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+die() { echo "ERROR: $*" >&2; exit 1; }
+
+# --- Dependencies ---
+command -v kubectl >/dev/null 2>&1 || die "kubectl is not installed or not in PATH"
+
+# --- Arguments ---
+SESSION_NAME="${1:-}"
+[ -n "$SESSION_NAME" ] || die "Usage: teardown.sh <session-name>"
+
+NAMESPACE="${PLAYWRIGHT_NAMESPACE:-playwright-sessions}"
+
+# --- Delete Job and Service ---
+echo "Tearing down session: ${SESSION_NAME} in namespace: ${NAMESPACE}" >&2
+
+kubectl delete job "$SESSION_NAME" -n "$NAMESPACE" --ignore-not-found >&2
+echo "Job deleted." >&2
+
+kubectl delete service "$SESSION_NAME" -n "$NAMESPACE" --ignore-not-found >&2
+echo "Service deleted." >&2
+
+echo "Session ${SESSION_NAME} torn down successfully." >&2