feat(mcp): add MCP Server Integration — Property Search, Analytics, Valuation

Implement 3 MCP servers in libs/mcp-servers/ using @modelcontextprotocol/sdk:

- Property Search: NL search via Typesense, property comparison, detail lookup
- Market Analytics: market reports, price trends, district comparison
- Valuation: AVM integration with Python AI service, feature extraction, batch valuation

Includes NestJS integration module with SSE transport for in-process hosting.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/package.json

@@ -13,6 +13,7 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
+    "@goodgo/mcp-servers": "workspace:*",
     "@nestjs/common": "^11.0.0",
     "@nestjs/core": "^11.0.0",
     "@nestjs/cqrs": "^11.0.0",