fix: legacy component serialisation was wiped out

When merging 4e958e229f, nobody caught the
fact we removed the component serialisation of legacy BungeeCord Chat
API components in the PacketPlayOutTitle class.

Test plugin code:

```kotlin
class LegacyMessageCommand : BaseCommand() {
    override fun register(manager: PaperCommandManager<CommandSender>) {
        manager.command(manager.commandBuilder("legacymsg")
            .sender<Player>()
            .handler {
                val component = ComponentBuilder("Test")
                    .color(ChatColor.DARK_RED)
                    .bold(true)
                    .append(" message")
                    .bold(false)
                    .color(ChatColor.of("#f8a8a8"))
                    .event(
                        HoverEvent(
                            HoverEvent.Action.SHOW_TEXT,
                            Text(
                                ComponentBuilder("Test hover")
                                    .color(ChatColor.AQUA)
                                    .underlined(true)
                                    .create()
                            )
                        )
                    )
                    .event(
                        ClickEvent(
                            ClickEvent.Action.SUGGEST_COMMAND,
                            "/legacymsg"
                        )
                    )
                    .create()
                it.sender.sendMessage(*component)
                it.sender.sendActionBar(*component)
                it.sender.sendTitle(
                    Title.builder()
                        .title(component)
                        .subtitle(component)
                        .fadeIn(40)
                        .stay(60)
                        .fadeOut(40)
                        .build()
                )
            })
    }
}
```

Fixes GH-5271.

Spigot-Server-Patches/0049-Player-Tab-List-and-Title-APIs.patch

@@ -16,8 +16,24 @@ index de6bfc27cd38fd6293853d55cf62699aade94212..65aec1dc2fd9ef9c9a9f022f13008505
          @Nullable
          public static IChatMutableComponent a(String s) {
              return (IChatMutableComponent) ChatDeserializer.a(IChatBaseComponent.ChatSerializer.a, s, IChatMutableComponent.class, false);
+diff --git a/src/main/java/net/minecraft/server/PacketDataSerializer.java b/src/main/java/net/minecraft/server/PacketDataSerializer.java
+index 6c9aed49d5e63d6df608719ed17e813f86e93fcc..391f96e585d80f7921fd96f207b0b60d88961ae7 100644
+--- a/src/main/java/net/minecraft/server/PacketDataSerializer.java
++++ b/src/main/java/net/minecraft/server/PacketDataSerializer.java
+@@ -158,6 +158,11 @@ public class PacketDataSerializer extends ByteBuf {
+     public PacketDataSerializer writeComponent(final net.kyori.adventure.text.Component component) {
+         return this.writeUtf(PaperAdventure.asJsonString(component, this.adventure$locale), 262144);
+     }
++
++    @Deprecated
++    public PacketDataSerializer writeComponent(final net.md_5.bungee.api.chat.BaseComponent[] component) {
++        return this.writeUtf(net.md_5.bungee.chat.ComponentSerializer.toString(component), 262144);
++    }
+     // Paper end
+ 
+     public PacketDataSerializer a(IChatBaseComponent ichatbasecomponent) {
 diff --git a/src/main/java/net/minecraft/server/PacketPlayOutTitle.java b/src/main/java/net/minecraft/server/PacketPlayOutTitle.java
-index 772ca6256964692a2b9c12e2edc532d2a8f51f7b..f98a261d825c9ebe284f1e3658ca1df451995b59 100644
+index 772ca6256964692a2b9c12e2edc532d2a8f51f7b..71168d9d0252e93253fa3b3f0bface3ae58757b7 100644
 --- a/src/main/java/net/minecraft/server/PacketPlayOutTitle.java
 +++ b/src/main/java/net/minecraft/server/PacketPlayOutTitle.java
 @@ -44,6 +44,17 @@ public class PacketPlayOutTitle implements Packet<PacketListenerPlayOut> {
@@ -38,6 +54,15 @@ index 772ca6256964692a2b9c12e2edc532d2a8f51f7b..f98a261d825c9ebe284f1e3658ca1df4
  
      @Override
      public void b(PacketDataSerializer packetdataserializer) throws IOException {
+@@ -52,6 +63,8 @@ public class PacketPlayOutTitle implements Packet<PacketListenerPlayOut> {
+             // Paper start
+             if (this.adventure$text != null) {
+                 packetdataserializer.writeComponent(this.adventure$text);
++            } else if (this.components != null) {
++                packetdataserializer.writeComponent(this.components);
+             } else
+             // Paper end
+             packetdataserializer.a(this.b);
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 index 4c0a6d00b17b5e11c0f2b5d7170701bedd20b87c..2542b3a135dd3f728a5a44c9f9c81ae524734abf 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

Spigot-Server-Patches/0261-Fix-client-rendering-skulls-from-same-user.patch

@@ -25,10 +25,10 @@ index bdb6f9bf3477f85859e3f0dd761e2e895f1a8e2b..22568201a292edc8e25396e55cad1572
      private Entity k;
      private ShapeDetectorBlock l;
 diff --git a/src/main/java/net/minecraft/server/PacketDataSerializer.java b/src/main/java/net/minecraft/server/PacketDataSerializer.java
-index 6c9aed49d5e63d6df608719ed17e813f86e93fcc..3d6fbde63d110559b552d052ef9a934318a00682 100644
+index 391f96e585d80f7921fd96f207b0b60d88961ae7..3a257d3b0a6adb4d0a43833b996d70765559eff8 100644
 --- a/src/main/java/net/minecraft/server/PacketDataSerializer.java
 +++ b/src/main/java/net/minecraft/server/PacketDataSerializer.java
-@@ -293,9 +293,18 @@ public class PacketDataSerializer extends ByteBuf {
+@@ -298,9 +298,18 @@ public class PacketDataSerializer extends ByteBuf {
              if (item.usesDurability() || item.n()) {
                  // Spigot start - filter
                  itemstack = itemstack.cloneItemStack();
@@ -48,7 +48,7 @@ index 6c9aed49d5e63d6df608719ed17e813f86e93fcc..3d6fbde63d110559b552d052ef9a9343
              }
  
              this.a(nbttagcompound);
-@@ -315,7 +324,16 @@ public class PacketDataSerializer extends ByteBuf {
+@@ -320,7 +329,16 @@ public class PacketDataSerializer extends ByteBuf {
              itemstack.setTag(this.l());
              // CraftBukkit start
              if (itemstack.getTag() != null) {

Spigot-Server-Patches/0299-Add-Velocity-IP-Forwarding-Support.patch

@@ -211,10 +211,10 @@ index 066b0dbdbc101a8235fb872c2d1e9d427dfd6bb8..ddad076c7eb6d30f2e0f187e004c9e19
      }
  
 diff --git a/src/main/java/net/minecraft/server/PacketDataSerializer.java b/src/main/java/net/minecraft/server/PacketDataSerializer.java
-index 3d6fbde63d110559b552d052ef9a934318a00682..4be310ada6477b2040f2ea11010f429c3f38c4ac 100644
+index 3a257d3b0a6adb4d0a43833b996d70765559eff8..8865e8e375f7cb437e5a7ff9f42a4156d8edd9e3 100644
 --- a/src/main/java/net/minecraft/server/PacketDataSerializer.java
 +++ b/src/main/java/net/minecraft/server/PacketDataSerializer.java
-@@ -173,6 +173,7 @@ public class PacketDataSerializer extends ByteBuf {
+@@ -178,6 +178,7 @@ public class PacketDataSerializer extends ByteBuf {
          return this.d(oenum.ordinal());
      }
  
@@ -222,7 +222,7 @@ index 3d6fbde63d110559b552d052ef9a934318a00682..4be310ada6477b2040f2ea11010f429c
      public int i() {
          int i = 0;
          int j = 0;
-@@ -213,6 +214,7 @@ public class PacketDataSerializer extends ByteBuf {
+@@ -218,6 +219,7 @@ public class PacketDataSerializer extends ByteBuf {
          return this;
      }
  
@@ -230,7 +230,7 @@ index 3d6fbde63d110559b552d052ef9a934318a00682..4be310ada6477b2040f2ea11010f429c
      public UUID k() {
          return new UUID(this.readLong(), this.readLong());
      }
-@@ -340,6 +342,7 @@ public class PacketDataSerializer extends ByteBuf {
+@@ -345,6 +347,7 @@ public class PacketDataSerializer extends ByteBuf {
          }
      }