fix: Codegens fillable containers (#862)

- [X] Fillable containers now relock/retrap after respawn.
- [X] Optimized the lookup and serialization.

Projects/UOContent/Items/Containers/Fillable Containers/FillableContainers.cs

@@ -0,0 +1,100 @@
+using ModernUO.Serialization;
+
+namespace Server.Items;
+
+[Flippable(0xA97, 0xA99, 0xA98, 0xA9A, 0xA9B, 0xA9C)]
+[SerializationGenerator(0)]
+public partial class LibraryBookcase : FillableContainer
+{
+    [Constructible]
+    public LibraryBookcase() : base(0xA97) => Weight = 1.0;
+
+    public override bool IsLockable => false;
+    public override int SpawnThreshold => 5;
+
+    protected override int GetSpawnCount() => 5 - GetItemsCount();
+
+    public override void AcquireContent()
+    {
+        if (_rawContentType != FillableContentType.None)
+        {
+            return;
+        }
+
+        RawContentType = FillableContentType.Library;
+        Respawn();
+    }
+}
+
+[Flippable(0xE3D, 0xE3C)]
+[SerializationGenerator(0)]
+public partial class FillableLargeCrate : FillableContainer
+{
+    [Constructible]
+    public FillableLargeCrate() : base(0xE3D) => Weight = 1.0;
+}
+
+[Flippable(0x9A9, 0xE7E)]
+[SerializationGenerator(0)]
+public partial class FillableSmallCrate : FillableContainer
+{
+    [Constructible]
+    public FillableSmallCrate() : base(0x9A9) => Weight = 1.0;
+}
+
+[Flippable(0x9AA, 0xE7D)]
+[SerializationGenerator(0)]
+public partial class FillableWoodenBox : FillableContainer
+{
+    [Constructible]
+    public FillableWoodenBox() : base(0x9AA) => Weight = 4.0;
+}
+
+[Flippable(0x9A8, 0xE80)]
+[SerializationGenerator(0)]
+public partial class FillableMetalBox : FillableContainer
+{
+    [Constructible]
+    public FillableMetalBox() : base(0x9A8)
+    {
+    }
+}
+
+[SerializationGenerator(0)]
+public partial class FillableBarrel : FillableContainer
+{
+    [Constructible]
+    public FillableBarrel() : base(0xE77)
+    {
+    }
+}
+
+[Flippable(0x9AB, 0xE7C)]
+[SerializationGenerator(0, false)]
+public partial class FillableMetalChest : FillableContainer
+{
+    [Constructible]
+    public FillableMetalChest() : base(0x9AB)
+    {
+    }
+}
+
+[Flippable(0xE41, 0xE40)]
+[SerializationGenerator(0, false)]
+public partial class FillableMetalGoldenChest : FillableContainer
+{
+    [Constructible]
+    public FillableMetalGoldenChest() : base(0xE41)
+    {
+    }
+}
+
+[Flippable(0xE43, 0xE42)]
+[SerializationGenerator(0, false)]
+public partial class FillableWoodenChest : FillableContainer
+{
+    [Constructible]
+    public FillableWoodenChest() : base(0xE43)
+    {
+    }
+}