feat: add generic form for proxy settings (apidash_design_system)

Author: abhinavs1920

packages/apidash_design_system/lib/widgets/form_generic.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/material.dart';
+
+/// A generic field configuration for the [GenericForm].
+class GenericFormField {
+  final TextEditingController controller;
+  
+  final String labelText;
+  
+  final String? hintText;
+  
+  final bool obscureText;
+  
+  final bool required;
+  
+  final String? Function(String?)? validator;
+
+  GenericFormField({
+    required this.controller,
+    required this.labelText,
+    this.hintText,
+    this.obscureText = false,
+    this.required = false,
+    this.validator,
+  });
+}
+
+/// A generic form that can be used throughout the application.
+class GenericForm extends StatelessWidget {
+  final List<GenericFormField> fields;
+  
+  final double fieldSpacing;
+  
+  const GenericForm({
+    super.key,
+    required this.fields,
+    this.fieldSpacing = 8.0,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: _buildFormFields(),
+    );
+  }
+
+  List<Widget> _buildFormFields() {
+    final List<Widget> formFields = [];
+
+    for (int i = 0; i < fields.length; i++) {
+      final field = fields[i];
+      
+      formFields.add(
+        TextField(
+          controller: field.controller,
+          decoration: InputDecoration(
+            labelText: field.labelText + (field.required ? ' *' : ''),
+            hintText: field.hintText,
+          ),
+          obscureText: field.obscureText,
+        ),
+      );
+
+      // Add spacing between fields (except after the last one)
+      if (i < fields.length - 1) {
+        formFields.add(SizedBox(height: fieldSpacing));
+      }
+    }
+
+    return formFields;
+  }
+}