feat(form): add shorthands to access validator status

packages/wyatt_form_bloc/lib/src/data/form/wyatt_form_impl.dart

@@ -144,6 +144,15 @@ class WyattFormImpl extends WyattForm {
   WyattForm operationWith(FormOperation operation, WyattForm other) =>
       operation.call(this, other);
 
+  @override
+  bool isPureInput(String key) => inputOf(key).validator.pure;
+
+  @override
+  bool isValidInput(String key) => inputOf(key).validator.valid;
+  
+  @override
+  bool isInvalidInput(String key) => inputOf(key).validator.invalid;
+
   @override
   List<Object?> get props => [_inputs, _name, _validator];
 

packages/wyatt_form_bloc/lib/src/domain/form/wyatt_form.dart

@@ -58,4 +58,8 @@ abstract class WyattForm extends Equatable {
   WyattForm clone();
   WyattForm operationWith(FormOperation operation, WyattForm other);
   WyattForm reset();
+
+  bool isPureInput(String key);
+  bool isValidInput(String key);
+  bool isInvalidInput(String key);
 }