adds a Start request to the req listener

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/pool/PoolRequests.kt

@@ -148,7 +148,13 @@ class PoolRequests {
         cmd: Command,
     ) {
         when (cmd) {
-            is ReqCmd -> subState(cmd.subId).onOpenReq(relay, cmd.filters)
+            is ReqCmd -> {
+                subState(cmd.subId).onOpenReq(relay, cmd.filters)
+                desiredSubListeners.get(cmd.subId)?.onStartReq(
+                    relay = relay.url,
+                    forFilters = cmd.filters,
+                )
+            }
             is CloseCmd -> subState(cmd.subId).onCloseReq(relay)
         }
     }

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/reqs/IRequestListener.kt

@@ -48,4 +48,9 @@ interface IRequestListener {
         message: String,
         forFilters: List<Filter>?,
     ) {}
+
+    fun onStartReq(
+        relay: String,
+        forFilters: List<Filter>,
+    ) {}
 }