Add extensions

Author: martijn00

lib/src/form_field_validator_extensions.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+import '../form_builder_validators.dart';
+
+extension FormFieldValidatorExtensions<T> on FormFieldValidator<T> {
+  /// Combines the current validator with another validator using logical AND.
+  FormFieldValidator<T> and(FormFieldValidator<T> other) {
+    return FormBuilderValidators.compose([this, other]);
+  }
+
+  /// Combines the current validator with another validator using logical OR.
+  FormFieldValidator<T> or(FormFieldValidator<T> other) {
+    return FormBuilderValidators.or([this, other]);
+  }
+
+  /// Adds a condition to apply the validator only if the condition is met.
+  FormFieldValidator<T> when(bool Function(T value) condition) {
+    return FormBuilderValidators.conditional(condition, this);
+  }
+}