chore: provide missing documentation

lib/input/stack_textfield.dart

@@ -2,6 +2,63 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
 class StackTextField extends StatefulWidget {
+  /// A customizable text input field that can be stacked with a label when text is entered.
+  ///
+  /// [hintText] is the text to display as a hint when the field is empty.
+  ///
+  /// [controller] is an optional [TextEditingController] to control the text field's text.
+  ///
+  /// [validator] is an optional function that validates the text input.
+  ///
+  /// [textInputAction] is an optional [TextInputAction] that specifies the action button to display on the keyboard.
+  ///
+  /// [inputFormatters] is an optional list of [TextInputFormatter]s that format and constrain the text input.
+  ///
+  /// [focusNode] is an optional [FocusNode] that manages the focus state of the text field.
+  ///
+  /// [onChanged] is an optional callback that is called when the text field's content changes.
+  ///
+  /// [label] is an optional label to be displayed above the text field when text is entered.
+  ///
+  /// [keyboardType] is an optional [TextInputType] that specifies the type of keyboard to use.
+  ///
+  /// [onTap] is an optional callback that is called when the text field is tapped.
+  ///
+  /// [readOnly] is an optional parameter that specifies whether the text field is read-only.
+  ///
+  /// [suffixIcon] is an optional widget to be displayed at the end of the text field.
+  ///
+  /// [scrollPadding] is an optional padding that insets the scrollable area to avoid the text field.
+  ///
+  /// [maxLines] is an optional parameter that specifies the maximum number of lines to allow in the text field.
+  ///
+  /// [autovalidateMode] is an optional parameter that controls when the text field should validate its content.
+  ///
+  /// [style] is an optional [TextStyle] to apply to the text field's text.
+  ///
+  /// [isDense] is an optional parameter that specifies whether the text field is visually dense.
+  ///
+  /// [prefixIcon] is an optional widget to be displayed at the start of the text field.
+  ///
+  /// [suffixText] is an optional text to be displayed after the text field.
+  ///
+  /// [suffixStyle] is an optional [TextStyle] to apply to the suffix text.
+  ///
+  /// [enabled] is an optional parameter that specifies whether the text field is enabled.
+  ///
+  /// [onFieldSubmitted] is an optional callback that is called when the text field's content is submitted.
+  ///
+  /// [textField] is an optional widget to replace the default text field.
+  ///
+  /// [obscuringText] is an optional parameter that specifies whether the text field obscures its text.
+  ///
+  /// [onEditingComplete] is an optional callback that is called when editing is complete.
+  ///
+  /// [onFocusChange] is an optional callback that is called when the focus state of the text field changes.
+  ///
+  /// [fillColor] is an optional color to fill the background of the text field.
+  ///
+  /// [labelColor] is an optional color to apply to the label text.
   const StackTextField({
     required this.hintText,
     this.controller,