Add discava MCP Server (Location Services)

Adds discava to the Location Services section.

discava is a free remote MCP server for searching local businesses 
across Europe and North America. It provides access to 10M+ listings sourced from OpenStreetMap, with confidence scores and agent trust rankings. No API key required.

- Remote MCP Server (SSE): https://discava.ai/api/mcp
- REST API: https://discava.ai/api/v1/search
- Website: https://discava.ai

Tools exposed:
- search_businesses: Full-text search by query, city, country, category
- get_business: Detailed business info by ID

README.md

@@ -1403,6 +1403,7 @@ Location-based services and mapping tools. Enables AI models to work with geogra
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