Add Clarvia AEO score badge to README

[digitamaz]

Hi! I am the maintainer of Clarvia (https://clarvia.art) - an AEO (Agent Experience Optimization) scoring platform for MCP servers.

Your server mcp-server-browserbase has been analyzed. Add the badge to your README:

[![Clarvia AEO Score](https://clarvia.art/api/badge/mcp-server-browserbase)](https://clarvia.art/tools/mcp-server-browserbase)

Shows developers and AI agents at a glance that your server is production-quality. Feel free to close if not relevant!