fix(WebSocketShard): mark shard ready if no guilds intent (#6284)

Co-authored-by: Sugden <28943913+NotSugden@users.noreply.github.com>

src/client/websocket/WebSocketShard.js

@@ -474,17 +474,23 @@ class WebSocketShard extends EventEmitter {
       this.emit(ShardEvents.ALL_READY);
       return;
     }
+    const hasGuildsIntent = new Intents(this.manager.client.options.intents).has(Intents.FLAGS.GUILDS);
     // Step 2. Create a 15s timeout that will mark the shard as ready if there are still unavailable guilds
-    this.readyTimeout = setTimeout(() => {
-      this.debug(`Shard did not receive any more guild packets in 15 seconds.
-  Unavailable guild count: ${this.expectedGuilds.size}`);
+    this.readyTimeout = setTimeout(
+      () => {
+        this.debug(
+          `Shard ${hasGuildsIntent ? 'did' : 'will'} not receive any more guild packets` +
+            `${hasGuildsIntent ? ' in 15 seconds' : ''}.\n   Unavailable guild count: ${this.expectedGuilds.size}`,
+        );
 
-      this.readyTimeout = null;
+        this.readyTimeout = null;
 
-      this.status = Status.READY;
+        this.status = Status.READY;
 
-      this.emit(ShardEvents.ALL_READY, this.expectedGuilds);
-    }, 15000).unref();
+        this.emit(ShardEvents.ALL_READY, this.expectedGuilds);
+      },
+      hasGuildsIntent ? 15000 : 0,
+    ).unref();
   }
 
   /**