feat: improve docs

Author: deandreamatias

lib/flutter_form_builder.dart

@@ -19,3 +19,4 @@ export 'src/fields/form_builder_text_field.dart';
 export 'src/widgets/grouped_checkbox.dart';
 export 'src/widgets/grouped_radio.dart';
 export 'src/options/form_builder_chip_option.dart';
+export 'src/options/display_values_enum.dart';

lib/src/fields/form_builder_switch.dart

@@ -64,7 +64,16 @@ class FormBuilderSwitch extends FormBuilderField<bool> {
   /// is used.
   final EdgeInsets contentPadding;
 
-  /// {@macro flutter.cupertino.switch.dragStartBehavior}
+  /// Where to place the control in widgets that use [ListTile] to position a
+  /// control next to a label.
+  ///
+  /// See also:
+  ///
+  ///  * [CheckboxListTile], which combines a [ListTile] with a [Checkbox].
+  ///  * [RadioListTile], which combines a [ListTile] with a [Radio] button.
+  ///  * [SwitchListTile], which combines a [ListTile] with a [Switch].
+  ///  * [ExpansionTile], which combines a [ListTile] with a button that expands
+  ///    or collapses the tile to reveal or hide the children.
   final ListTileControlAffinity controlAffinity;
 
   /// Whether to render icons and text in the [activeColor].

lib/src/options/display_values_enum.dart

@@ -0,0 +1,7 @@
+/// Configuration to what values show on sliders
+///
+/// - `all`: Show all values
+/// - `current`: Show only the current value (middle)
+/// - `minMax`: Show only the min and max values (start and finish)
+/// - `none`: No show any values
+enum DisplayValues { all, current, minMax, none }