feat: Add MC 26.2 palettes, registries and new sulfur/cinnabar content

Generated from the 26.2 server data reports (registries.json / blocks.json):
- ItemPalette262 (1537 items, 31 new; IDs shifted by early sulfur/cinnabar inserts)
- Palette262 blocks (1196 blocks, 32366 states, 28 new)
- EntityPalette262 (158 entities, new sulfur_cube)
- StructuredComponentsRegistry262 with new sulfur_cube_content component
  at ID 78 (shifts IDs 78-109 up by one); wire format is one ItemStackTemplate
- New ItemType/Material/EntityType enum entries for the sulfur and
  cinnabar families, MusicDiscBounce, SulfurSpike and SulfurCube

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

MinecraftClient/Protocol/Handlers/StructuredComponents/Components/26_2/SulfurCubeContentComponent262.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using MinecraftClient.Inventory;
+using MinecraftClient.Inventory.ItemPalettes;
+using MinecraftClient.Protocol.Handlers.StructuredComponents.Core;
+
+namespace MinecraftClient.Protocol.Handlers.StructuredComponents.Components._26_2;
+
+public class SulfurCubeContentComponent262(DataTypes dataTypes, ItemPalette itemPalette, SubComponentRegistry subComponentRegistry)
+    : StructuredComponent(dataTypes, itemPalette, subComponentRegistry)
+{
+    public Item? AbsorbedBlockItemStack { get; set; }
+
+    public override void Parse(Queue<byte> data)
+    {
+        AbsorbedBlockItemStack = DataTypes.ReadNextItemStackTemplate(data, ItemPalette);
+    }
+
+    public override Queue<byte> Serialize()
+    {
+        var data = new List<byte>();
+        if (AbsorbedBlockItemStack is not null && !AbsorbedBlockItemStack.IsEmpty)
+            data.AddRange(DataTypes.GetItemStackTemplate(AbsorbedBlockItemStack, ItemPalette));
+        return new Queue<byte>(data);
+    }
+}