chore: moved primitive converters under subfolder

Engine.Serialization/Converters/Primitives/QuaternionConverter.cs

@@ -0,0 +1,28 @@
+using Syntriax.Engine.Core;
+
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+using YamlDotNet.Serialization;
+
+namespace Syntriax.Engine.Serialization;
+
+public class QuaternionConverter : IEngineTypeYamlConverter
+{
+    private static readonly int SUBSTRING_START_LENGTH = nameof(Quaternion).Length + 1;
+
+    public bool Accepts(Type type) => type == typeof(Quaternion);
+
+    public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
+    {
+        string value = parser.Consume<Scalar>().Value;
+        string insideParenthesis = value[SUBSTRING_START_LENGTH..^1];
+        string[] values = insideParenthesis.Split(", ");
+        return new Quaternion(float.Parse(values[0]), float.Parse(values[1]), float.Parse(values[2]), float.Parse(values[3]));
+    }
+
+    public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
+    {
+        Quaternion quaternion = (Quaternion)value!;
+        emitter.Emit(new Scalar($"{nameof(Quaternion)}({quaternion.X}, {quaternion.Y}, {quaternion.Z}, {quaternion.W})"));
+    }
+}