browsercli v1.0.4

Added

• Built-in templates -- 4 starter templates (tailwind, dashboard, chart, form) ship with the binary, no plugins needed. Use browsercli start --template <name>. All templates use Tailwind CSS v4 CDN with zero build step.
• TROUBLESHOOTING.md -- comprehensive guide covering browser detection, port conflicts, headless mode, permissions, and more
• Improved browser-not-found error -- platform-specific install instructions (macOS/Linux/Windows) shown when no Chromium browser is detected

Changed

• plugin list now displays built-in templates alongside plugin-provided templates
• README and README_CN updated with built-in template documentation and troubleshooting section