Refactor SPMD job system, add GGX mipmap benchmark

- Replace IJobSPMD with T4-generated, multi-type SPMD job interfaces and wrappers (up to 8 numeric types)
- Extend ISPMD with Cast/BitCast; implement for ScalarLane and WideLane (SIMD-aware)
- Add unary minus, scalar-lane, and lane-scalar operators to Vector2/3/4; improve Select methods
- WideLane now partial with T4-generated Cast/BitCast (SIMD conversions)
- SPMD job Execute now requires unmanaged TLane; update all usages and benchmarks
- Add GGXMipGenerationBenchmark with vectorized and scalar paths, SkiaSharp output
- Update project files: add generated code, SkiaSharp, bump version to 1.3.0
- Misc: fix formatting, method signatures, FreeList logic

Misaki.HighPerformance.Mathematics.SPMD/Templates/MathV.Vector.gen.cs

@@ -11,7 +11,7 @@ namespace Misaki.HighPerformance.Mathematics.SPMD;
 
 public static unsafe partial class MathV
 {
-# region Vector2
+    #region Vector2
 
     // Creation Functions
 
@@ -212,7 +212,7 @@ public static unsafe partial class MathV
     {
         return TLane.Sqrt(Dot(vector, vector));
     }
-    
+
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static TLane LengthSquared<TLane, TNumber>(in Vector2<TLane, TNumber> vector)
         where TLane : ISPMD<TLane, TNumber>
@@ -283,9 +283,9 @@ public static unsafe partial class MathV
         };
     }
 
-# endregion
+    #endregion
 
-# region Vector3
+    #region Vector3
 
     // Creation Functions
 
@@ -498,7 +498,7 @@ public static unsafe partial class MathV
     {
         return TLane.Sqrt(Dot(vector, vector));
     }
-    
+
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static TLane LengthSquared<TLane, TNumber>(in Vector3<TLane, TNumber> vector)
         where TLane : ISPMD<TLane, TNumber>
@@ -554,6 +554,7 @@ public static unsafe partial class MathV
         {
             x = TLane.Select(condition, b.x, a.x),
             y = TLane.Select(condition, b.y, a.y),
+            z = TLane.Select(condition, b.z, a.z),
         };
     }
 
@@ -566,12 +567,13 @@ public static unsafe partial class MathV
         {
             x = TLane.Select(condition.x, b.x, a.x),
             y = TLane.Select(condition.y, b.y, a.y),
+            z = TLane.Select(condition.z, b.z, a.z),
         };
     }
 
-# endregion
+    #endregion
 
-# region Vector4
+    #region Vector4
 
     // Creation Functions
 
@@ -796,7 +798,7 @@ public static unsafe partial class MathV
     {
         return TLane.Sqrt(Dot(vector, vector));
     }
-    
+
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static TLane LengthSquared<TLane, TNumber>(in Vector4<TLane, TNumber> vector)
         where TLane : ISPMD<TLane, TNumber>
@@ -852,6 +854,8 @@ public static unsafe partial class MathV
         {
             x = TLane.Select(condition, b.x, a.x),
             y = TLane.Select(condition, b.y, a.y),
+            z = TLane.Select(condition, b.z, a.z),
+            w = TLane.Select(condition, b.w, a.w),
         };
     }
 
@@ -864,13 +868,15 @@ public static unsafe partial class MathV
         {
             x = TLane.Select(condition.x, b.x, a.x),
             y = TLane.Select(condition.y, b.y, a.y),
+            z = TLane.Select(condition.z, b.z, a.z),
+            w = TLane.Select(condition.w, b.w, a.w),
         };
     }
 
-# endregion
+    #endregion
 
 
-# region Vector3 Specific
+    #region Vector3 Specific
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static Vector3<TLane, TNumber> Cross<TLane, TNumber>(in Vector3<TLane, TNumber> a, in Vector3<TLane, TNumber> b)
@@ -885,6 +891,6 @@ public static unsafe partial class MathV
         };
     }
 
-# endregion
+    #endregion
 }