refactor(registration): Autocomplete for city, numeric inputs for weight & height, examples for sports and add info

lib/widgets/custom_text_form_field.dart

@@ -28,6 +28,7 @@ class CustomTextFormField extends StatelessWidget {
     this.filled = true,
     this.validator,
     this.keyboardType,
+    this.onFieldSubmitted,
     this.onSaved,
   }) : super(
           key: key,
@@ -56,6 +57,7 @@ class CustomTextFormField extends StatelessWidget {
   final bool? filled;
   final TextInputType? keyboardType;
   final FormFieldValidator<String>? validator;
+  final Function(String)? onFieldSubmitted;
   final void Function(String?)? onSaved;
 
   @override
@@ -73,6 +75,7 @@ class CustomTextFormField extends StatelessWidget {
                 obscureText: obscureText!,
                 textInputAction: textInputAction,
                 maxLines: maxLines ?? 1,
+                onFieldSubmitted: onFieldSubmitted,
                 decoration: InputDecoration(
                   hintText: hintText ?? "",
                   hintStyle: hintStyle ?? theme.textTheme.bodyLarge,