Added nullable annotation for all generated files

HPPH.Generators/ColorSortSourceGenerator.cs

@@ -15,6 +15,8 @@ public class ColorSortSourceGenerator : IIncrementalGenerator
     #region Properties & Fields
 
     private const string SORT_GENERATOR_ATTRIBUTE_SOURCE = """
+                                                            #nullable enable
+                                                            
                                                             namespace HPPH;
                                                             
                                                             [AttributeUsage(AttributeTargets.Method)]
@@ -79,6 +81,8 @@ public class ColorSortSourceGenerator : IIncrementalGenerator
         foreach (KeyValuePair<(string @namespace, string @class, string classModifier), string> data in sourceMapping)
         {
             context.AddSource($"{data.Key.@class}.g.cs", SourceText.From($$"""
+                                                                           #nullable enable
+                                                                           
                                                                            using System.Buffers;
                                                                            
                                                                            namespace {{data.Key.@namespace}};

HPPH.Generators/Features/Average.cs

@@ -18,6 +18,8 @@ internal class Average : IGeneratorFeature
     private static string GenerateColorFormatAverage(ColorFormatData colorFormat)
     {
         return $$"""
+                 #nullable enable
+                 
                  using System.Runtime.InteropServices;
                  
                  namespace HPPH;
@@ -36,6 +38,8 @@ internal class Average : IGeneratorFeature
     private static string GenerateColorFormatInterfaceAverage()
     {
         return """
+               #nullable enable
+               
                namespace HPPH;
                
                public partial interface IColorFormat

HPPH.Generators/Features/Colors.cs

@@ -25,6 +25,8 @@ internal class Colors : IGeneratorFeature
      => colorFormat.Bpp switch
      {
          3 => $$"""
+                #nullable enable
+                
                 // ReSharper disable ConvertToAutoProperty
                 // ReSharper disable ConvertToAutoPropertyWhenPossible
                 // ReSharper disable ReplaceWithPrimaryConstructorParameter
@@ -89,6 +91,8 @@ internal class Colors : IGeneratorFeature
                 """,
 
          4 => $$"""
+                #nullable enable
+                
                 // ReSharper disable ConvertToAutoProperty
                 // ReSharper disable ConvertToAutoPropertyWhenPossible
                 // ReSharper disable ReplaceWithPrimaryConstructorParameter
@@ -159,6 +163,8 @@ internal class Colors : IGeneratorFeature
     private static string GenerateColorFormatCode(ColorFormatData colorFormat)
     {
         return $$"""
+                 #nullable enable
+                 
                  namespace HPPH;
 
                  public sealed partial class ColorFormat{{colorFormat.Format}} : IColorFormat
@@ -188,6 +194,8 @@ internal class Colors : IGeneratorFeature
     {
         StringBuilder sb = new();
         sb.AppendLine("""
+                      #nullable enable
+                      
                       namespace HPPH;
 
                       public partial interface IColorFormat

HPPH.Generators/Features/MinMax.cs

@@ -20,6 +20,8 @@ internal class MinMax : IGeneratorFeature
      => colorFormat.Bpp switch
      {
          3 => $$"""
+                 #nullable enable
+                 
                  // ReSharper disable ConvertToAutoProperty
                  // ReSharper disable ReplaceWithPrimaryConstructorParameter
                  
@@ -73,6 +75,8 @@ internal class MinMax : IGeneratorFeature
                  """,
 
          4 => $$"""
+                #nullable enable
+                
                 // ReSharper disable ConvertToAutoProperty
                 // ReSharper disable ReplaceWithPrimaryConstructorParameter
                 
@@ -133,6 +137,8 @@ internal class MinMax : IGeneratorFeature
     private static string GenerateColorFormatMinMax(ColorFormatData colorFormat)
     {
         return $$"""
+                 #nullable enable
+                 
                  using System.Runtime.InteropServices;
                  
                  namespace HPPH;
@@ -151,6 +157,8 @@ internal class MinMax : IGeneratorFeature
     private static string GenerateColorFormatInterfaceMinMax()
     {
         return """
+               #nullable enable
+               
                namespace HPPH;
                
                public partial interface IColorFormat

HPPH.Generators/Features/Quantize.cs

@@ -18,6 +18,8 @@ internal class Quantize : IGeneratorFeature
     private static string GenerateColorFormatQuantize(ColorFormatData colorFormat)
     {
         return $$"""
+                 #nullable enable
+                 
                  using System.Runtime.InteropServices;
                  
                  namespace HPPH;
@@ -56,6 +58,8 @@ internal class Quantize : IGeneratorFeature
     private static string GenerateColorFormatInterfaceQuantize()
     {
         return """
+               #nullable enable
+               
                namespace HPPH;
                
                public partial interface IColorFormat

HPPH.Generators/Features/Sum.cs

@@ -20,6 +20,8 @@ internal class Sum : IGeneratorFeature
      => colorFormat.Bpp switch
      {
          3 => $$"""
+                #nullable enable
+                
                 // ReSharper disable ConvertToAutoProperty
                 // ReSharper disable ConvertToAutoPropertyWhenPossible
                 // ReSharper disable ReplaceWithPrimaryConstructorParameter
@@ -58,6 +60,8 @@ internal class Sum : IGeneratorFeature
                 """,
 
          4 => $$"""
+                #nullable enable
+                
                 // ReSharper disable ConvertToAutoProperty
                 // ReSharper disable ConvertToAutoPropertyWhenPossible
                 // ReSharper disable ReplaceWithPrimaryConstructorParameter
@@ -100,6 +104,8 @@ internal class Sum : IGeneratorFeature
     private static string GenerateColorFormatSum(ColorFormatData colorFormat)
     {
         return $$"""
+                 #nullable enable
+                 
                  using System.Runtime.InteropServices;
                  
                  namespace HPPH;
@@ -118,6 +124,8 @@ internal class Sum : IGeneratorFeature
     private static string GenerateColorFormatInterfaceSum()
     {
         return """
+               #nullable enable
+               
                namespace HPPH;
                
                public partial interface IColorFormat