docs(autonat): Add documentation on where to get results of service

packages/protocol-autonat/src/index.ts

@@ -1,8 +1,17 @@
 /**
  * @packageDocumentation
  *
- * Use the `autoNATService` function to add support for the [AutoNAT protocol](https://docs.libp2p.io/concepts/nat/autonat/)
- * to libp2p.
+ * The AutoNAT service uses the [AutoNAT protocol](https://docs.libp2p.io/concepts/nat/autonat/).
+ *
+ * The service dials randomly selected peers with a request to verify it's external addresses.
+ * The request includes a list of public multiaddrs (addressManager.getObservedAddrs()).
+ * The remote peers dial that list and respond with the results.
+ *
+ * The AutoNAT service uses those responses to either:
+ * - addressManager.confirmObservedAddr(addr)
+ * - addressManager.removeObservedAddr(addr)
+ *
+ * The list of candidates and confirmed addresses can be found at addressManager.getObservedAddrs()
  *
  * @example
  *