dsh-browser-playwright-codex: Enabling AI to Operate in Real Browsers

`dsh-browser-playwright-codex` is a browser automation plugin for DeepSeek Harness (DSH) that uses Playwright to drive AI-based web operations in a visible browser window. Its core features include reusing logged-in accounts, preserving browser state, supporting multi-tab management and screenshots, and enabling stable operations through `ref` references. When it encounters CAPTCHAs or pop-up dialogs, the plugin automatically pauses and waits for human intervention, thereby addressing real-world login and interaction challenges. After installation, high-risk `evaluate` and `cdp` tools are disabled by default, and users must first obtain a Snapshot before performing subsequent actions. It is suitable for use cases such as list scraping, form filling, and order querying.