Implement core entity management features

Added `Archetype` struct with chunk management and disposal.
Added `BitSet` class for managing collections of bits.
Added `Class1.cs` as a placeholder for graphics functionality.
Added `ComponentData` struct and `ComponentPool` class for component management.
Added `ComponentRegistry` for efficient component registration.
Added `EntityChangeQueue` as a placeholder for future changes.
Added `Helpers.ttinclude` and `QueryRefComponent.tt` for code generation.
Added `Signature` struct for managing component signatures.
Added `World` struct to manage the game world and entities.
Added `QueryRefComponent` delegates for querying entities.

Changed `Archetype.cs` to implement `IDisposable`.
Changed `AssemblyInfo.cs` to update global using directives.
Changed `Chunk.cs` to introduce `ChunkCollection` for chunk management.
Changed `Component.cs` to refine component management methods.
Changed `Entity.cs` to improve properties and methods.
Changed `Ghost.Entities.csproj` to update project properties.
Changed `Program.cs` to demonstrate entity creation and querying.
Changed `World.Query.cs` to facilitate querying with components.

Ghost.ArchetypeEntities/Entity.cs

@@ -0,0 +1,93 @@
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Entities;
+
+[SkipLocalsInit]
+public struct Entity : IEquatable<Entity>, IComparable<Entity>
+{
+    private const EntityID _WORLD_INDEX_BITS = 4u;
+    private const EntityID _GENERATION_BITS = 8u;
+    private const EntityID _INDEX_BITS = sizeof(EntityID) * 8 - _WORLD_INDEX_BITS - _GENERATION_BITS;
+
+    private const EntityID _WORLD_INDEX_MASK = (1u << (int)_WORLD_INDEX_BITS) - 1;
+    private const EntityID _GENERATION_MASK = (1u << (int)_GENERATION_BITS) - 1;
+    private const EntityID _INDEX_MASK = (1u << (int)_INDEX_BITS) - 1;
+    private const EntityID _ID_MASK = EntityID.MaxValue;
+
+    private EntityID _id;
+
+    public readonly bool IsValid
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => _id != _ID_MASK;
+    }
+
+    public readonly EntityID Index
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => _id & _INDEX_MASK;
+    }
+
+    public readonly GenerationID Generation
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => (GenerationID)(_id >> (int)_INDEX_BITS & _GENERATION_MASK);
+    }
+
+    public readonly WorldID WorldIndex
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => (WorldID)(_id >> (int)(_INDEX_BITS + _GENERATION_BITS) & _WORLD_INDEX_MASK);
+    }
+
+    public void IncrementGeneration()
+    {
+        var generation = Generation + 1u;
+        if (generation >= _GENERATION_MASK)
+        {
+            throw new InvalidOperationException("Generation overflow");
+        }
+
+        _id = _id & ~(_GENERATION_MASK << (int)_INDEX_BITS) | generation << (int)_INDEX_BITS;
+    }
+
+    internal Entity(EntityID index, EntityID generation, EntityID worldIndex)
+    {
+        _id = worldIndex << (int)(_INDEX_BITS + _GENERATION_BITS) | generation << (int)_INDEX_BITS | index;
+    }
+
+    public readonly bool Equals(Entity other)
+    {
+        return _id == other._id;
+    }
+
+    public readonly int CompareTo(Entity other)
+    {
+        return _id.CompareTo(other._id);
+    }
+
+    public override readonly bool Equals(object? obj)
+    {
+        return obj is Entity other && Equals(other);
+    }
+
+    public override readonly int GetHashCode()
+    {
+        return _id.GetHashCode();
+    }
+
+    public static bool operator ==(Entity left, Entity right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(Entity left, Entity right)
+    {
+        return !(left == right);
+    }
+
+    public override readonly string ToString()
+    {
+        return $"Entity {{ Index: {Index}, Generation: {Generation}, WorldIndex: {WorldIndex} }}";
+    }
+}