Moves EmptyNostrClient to a class to avoid auto-import issues

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

@@ -87,7 +87,7 @@ interface INostrClient : AutoCloseable {
     fun activeOutboxCache(url: NormalizedRelayUrl): Set<HexKey>
 }
 
-object EmptyNostrClient : INostrClient {
+class EmptyNostrClient : INostrClient {
     override fun connectedRelaysFlow() = MutableStateFlow(emptySet<NormalizedRelayUrl>())
 
     override fun availableRelaysFlow() = MutableStateFlow(emptySet<NormalizedRelayUrl>())

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/accessories/NostrClientReqBypassingRelayLimitsExt.kt

@@ -21,8 +21,6 @@
 package com.vitorpamplona.quartz.nip01Core.relay.client.accessories
 
 import com.vitorpamplona.quartz.nip01Core.core.Event
-import com.vitorpamplona.quartz.nip01Core.relay.client.EmptyNostrClient.close
-import com.vitorpamplona.quartz.nip01Core.relay.client.EmptyNostrClient.openReqSubscription
 import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
 import com.vitorpamplona.quartz.nip01Core.relay.client.reqs.IRequestListener
 import com.vitorpamplona.quartz.nip01Core.relay.client.single.newSubId

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip46RemoteSigner/signer/ConvertExceptionsTest.kt

@@ -34,7 +34,7 @@ class ConvertExceptionsTest {
         NostrSignerRemote.fromBunkerUri(
             "bunker://${"a".repeat(64)}?relay=wss://r.com",
             NostrSignerInternal(KeyPair()),
-            EmptyNostrClient,
+            EmptyNostrClient(),
         )
 
     @Test

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip46RemoteSigner/signer/FromBunkerUriTest.kt

@@ -30,7 +30,7 @@ import kotlin.test.assertNull
 
 class FromBunkerUriTest {
     private val signer = NostrSignerInternal(KeyPair())
-    private val client = EmptyNostrClient
+    private val client = EmptyNostrClient()
     private val validHex = "a".repeat(64)
 
     @Test