Refactor GPU resource management and rendering pipeline

- Introduced `Handle<T>` and `Identifier<T>` for lightweight, strongly-typed resource identifiers.
- Replaced `BitSet` with `UnsafeBitSet` for improved performance and memory safety.
- Refactored `Mesh` and `Material` into `MeshClass` and `MaterialClass` for better GPU resource handling.
- Added `D3D12ResourceDatabase` to centralize GPU resource tracking and lifecycle management.
- Updated `D3D12ShaderCompiler` to load shaders from disk and dynamically populate constant buffers and textures.
- Enhanced `ICommandBuffer` with new upload operations for buffers and textures.
- Refactored `Vertex` struct for simplified memory layout and better performance.
- Updated `MeshBuilder` and rendering logic to align with new resource and shader structures.
- Added `BindlessDescriptor` support to `TextureHandle` and `BufferHandle`.
- Removed unused classes and performed general cleanup.
- Updated unit tests and demos to reflect the new architecture.

Ghost.Graphics/Data/Color.cs

@@ -7,14 +7,14 @@ namespace Ghost.Graphics.Data;
 /// Represents a color with 4 bytes components.
 /// </summary>
 [StructLayout(LayoutKind.Sequential, Size = 4)]
-public struct Color4 : IEquatable<Color4>
+public struct Color32 : IEquatable<Color32>
 {
     public byte r;
     public byte g;
     public byte b;
     public byte a;
 
-    public Color4(byte r, byte g, byte b, byte a)
+    public Color32(byte r, byte g, byte b, byte a)
     {
         this.r = r;
         this.g = g;
@@ -22,24 +22,24 @@ public struct Color4 : IEquatable<Color4>
         this.a = a;
     }
 
-    public Color4(Color color)
+    public Color32(Color color)
         : this(color.R, color.G, color.B, color.A)
     {
     }
 
-    public Color4(Color16 color128)
+    public Color32(Color128 color128)
         : this((byte)(color128.r * 255.0f), (byte)(color128.g * 255.0f), (byte)(color128.b * 255.0f), (byte)(color128.a * 255.0f))
     {
     }
 
-    public readonly bool Equals(Color4 other)
+    public readonly bool Equals(Color32 other)
     {
         return r == other.r && g == other.g && b == other.b && a == other.a;
     }
 
     public override readonly bool Equals(object? obj)
     {
-        return obj is Color4 color && Equals(color);
+        return obj is Color32 color && Equals(color);
     }
 
     public override readonly int GetHashCode()
@@ -47,12 +47,12 @@ public struct Color4 : IEquatable<Color4>
         return HashCode.Combine(r, g, b, a);
     }
 
-    public static bool operator ==(Color4 left, Color4 right)
+    public static bool operator ==(Color32 left, Color32 right)
     {
         return left.Equals(right);
     }
 
-    public static bool operator !=(Color4 left, Color4 right)
+    public static bool operator !=(Color32 left, Color32 right)
     {
         return !(left == right);
     }
@@ -62,14 +62,14 @@ public struct Color4 : IEquatable<Color4>
 /// Represents a color with 16 bytes components.
 /// </summary>
 [StructLayout(LayoutKind.Sequential, Size = 16)]
-public struct Color16 : IEquatable<Color16>
+public struct Color128 : IEquatable<Color128>
 {
     public float r;
     public float g;
     public float b;
     public float a;
 
-    public Color16(float r, float g, float b, float a)
+    public Color128(float r, float g, float b, float a)
     {
         this.r = r;
         this.g = g;
@@ -77,24 +77,24 @@ public struct Color16 : IEquatable<Color16>
         this.a = a;
     }
 
-    public Color16(Color color)
+    public Color128(Color color)
         : this(color.R / 255.0f, color.G / 255.0f, color.B / 255.0f, color.A / 255.0f)
     {
     }
 
-    public Color16(Color4 color32)
+    public Color128(Color32 color32)
         : this(color32.r / 255.0f, color32.g / 255.0f, color32.b / 255.0f, color32.a / 255.0f)
     {
     }
 
-    public readonly bool Equals(Color16 other)
+    public readonly bool Equals(Color128 other)
     {
         return r.Equals(other.r) && g.Equals(other.g) && b.Equals(other.b) && a.Equals(other.a);
     }
 
     public override readonly bool Equals(object? obj)
     {
-        return obj is Color16 color && Equals(color);
+        return obj is Color128 color && Equals(color);
     }
 
     public readonly override int GetHashCode()
@@ -102,12 +102,12 @@ public struct Color16 : IEquatable<Color16>
         return HashCode.Combine(r, g, b, a);
     }
 
-    public static bool operator ==(Color16 left, Color16 right)
+    public static bool operator ==(Color128 left, Color128 right)
     {
         return left.Equals(right);
     }
 
-    public static bool operator !=(Color16 left, Color16 right)
+    public static bool operator !=(Color128 left, Color128 right)
     {
         return !(left == right);
     }