feat: add MongoDB data importer tool and update README

README.md

@@ -30,6 +30,8 @@ The MCP Registry service provides a centralized repository for MCP server entrie
 │   └── service/   # Business logic
 ├── pkg/           # Public libraries
 ├── scripts/       # Utility scripts
+├── tools/         # Command line tools
+│   └── importer/  # MongoDB data importer tool
 └── build/         # Build artifacts
 ```
 
@@ -109,6 +111,19 @@ The fake service is useful for:
 - Testing API integrations
 - Example data structure reference
 
+## Tools
+
+### Data Importer
+
+A command-line tool for importing server data from a JSON file into a MongoDB database:
+
+```bash
+cd tools/importer
+go run main.go -uri mongodb://localhost:27017 -db mcp_registry -collection servers -seed ../../data/seed.json
+```
+
+For more details on the importer tool, see the [importer README](./tools/importer/README.md).
+
 ## API Documentation
 
 The API is documented using Swagger/OpenAPI. You can access the interactive Swagger UI at: