fix(mcp): add resource_link to McpToolCallResponse type union

@modelcontextprotocol/sdk v1.26.0 introduced a new 'resource_link' content
type in tool call responses. Without this type in the McpToolCallResponse
union, TypeScript compilation fails at McpHub.ts:2208 and :2253 with TS2322.

The new type includes uri, name, optional description, and optional mimeType,
matching the SDK's ResourceLink definition.

Fixes compile failure in PR #351

Author: proyectoauraorg

packages/types/src/mcp.ts

@@ -125,6 +125,13 @@ export type McpToolCallResponse = {
 					blob?: string
 				}
 		  }
+		| {
+				type: "resource_link"
+				uri: string
+				name: string
+				description?: string
+				mimeType?: string
+		  }
 	>
 	isError?: boolean
 }