improve: move planned features auto registry to features

README.md

@@ -28,12 +28,12 @@ Other modules such as morphisms, groups, rings, and fields are under development
 - Vector spaces and Affine space operations
 - Analytic functions, Polynomials, and Bivariant functions
 - Sampling of Special Matrices
+- Auto-registration for custom fields and dimensions
 
 ## Planned Features
 
 - Statistics: Hypothesis testing
 - Algebra: Group and Ring operations
-- Auto-registration for custom fields and dimensions
 
 ## Supported Matrix Types
 
@@ -123,6 +123,7 @@ public interface IDimX
 #### Custom Field
 To use a custom field, implement a FieldStructure class with the following required methods:
 ```csharp
+[CustomFieldStructure]
 class CustomFieldStructure : FieldStructure<TScalar>
 {
     abstract TScalar Addition(TScalar self, TScalar other);
@@ -158,10 +159,6 @@ virtual TScalar Subtraction(TScalar self, TScalar other);
 
 ```
 
-Finally, register the custom field:
-```csharp
-ScalarFieldStructureProvider.Register(new CustomFieldStructure());
-```
 ## License
 [MIT][license] © [hzhang][author]