Allow setting player list name early

patches/server/Adventure.patch

@@ -3997,6 +3997,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @Override
 +    public void playerListName(net.kyori.adventure.text.Component name) {
 +        getHandle().listName = name == null ? null : io.papermc.paper.adventure.PaperAdventure.asVanilla(name);
++        if (getHandle().connection == null) return; // Updates are possible before the player has fully joined
 +        for (ServerPlayer player : server.getHandle().players) {
 +            if (player.getBukkitEntity().canSee(this)) {
 +                player.connection.send(new ClientboundPlayerInfoUpdatePacket(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME, getHandle()));
@@ -4019,6 +4020,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      @Override
      public String getPlayerListName() {
          return this.getHandle().listName == null ? this.getName() : CraftChatMessage.fromComponent(this.getHandle().listName);
+@@ -0,0 +0,0 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+             name = this.getName();
+         }
+         this.getHandle().listName = name.equals(this.getName()) ? null : CraftChatMessage.fromStringOrNull(name);
++        if (this.getHandle().connection == null) return; // Paper - Updates are possible before the player has fully joined
+         for (ServerPlayer player : (List<ServerPlayer>) this.server.getHandle().players) {
+             if (player.getBukkitEntity().canSee(this)) {
+                 player.connection.send(new ClientboundPlayerInfoUpdatePacket(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME, this.getHandle()));
 @@ -0,0 +0,0 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
          }
      }