feat: add official playwright-cli SKILL.md with reference docs

fix: correct playwright-cli skill to use @playwright/cli, not MCP

feat: add shared ai/ workspace with symlinks for Claude and Copilot

feat: cache auth state between test runs

feat: add timeout constants, data factory, auth setup, and improved config

docs: add ChatGPT project instructions for prompt generation

chore: rename to playwright-agent-mcp-starter

fix: make all tests pass out of the box

chore: polish template repo (LICENSE, CI, security, docs, README)

Initial boilerplate: Playwright TS + MCP + AI agents