Add tags field to Server struct in MCP model

- Introduce a new Tags field in the Server struct to allow for additional metadata.
- Update the listServers function to populate the Tags field from the server metadata, enhancing the server representation with more contextual information.

openapi/mcp/mcp.go

@@ -13,6 +13,7 @@ type Server struct {
 	Value       string   `json:"value"`
 	Name        string   `json:"name"`
 	Description string   `json:"description,omitempty"`
+	Tags        []string `json:"tags,omitempty"`
 	Transport   string   `json:"transport,omitempty"` // "stdio", "sse", "http"
 	Builtin     bool     `json:"builtin"`             // true for system built-in, false for user-defined
 }
@@ -58,6 +59,7 @@ func listServers(c *gin.Context) {
 			Value:       id,
 			Name:        name,
 			Description: meta.Description,
+			Tags:        meta.Tags,
 			Transport:   transport,
 			Builtin:     meta.Builtin,
 		})