Stepper: add Overview demo description (DevExpress#29701)

Author: arman-boyakhchyan

apps/demos/Demos/Stepper/Overview/description.md

@@ -1,5 +1,40 @@
-Our upcoming major release (v25.1) will introduce a Stepper component designed to describe/detail progress as users navigate through a defined sequence. 
+The DevExtreme Stepper is a UI component that indicates progress in a multi-step process and enables users to navigate between individual steps. You can add Stepper components to lengthy data entry forms such as guest checkouts or credit card applications. 
+
+To get started with DevExtreme Stepper, refer to the following step-by-step tutorial: [Getting Started with Stepper](/Documentation/Guide/UI_Components/Stepper/Getting_Started_with_Stepper/).
 <!--split-->
-Stepper will work especially well for multi-step processes like filling forms, onboarding flows, or wizards.   
 
-You will be able to customize the appearance of individual steps and modify component settings to address specific usage scenarios. 
+## Component Configuration
+
+The following settings are available:
+
+- [orientation](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/#orientation) (default: *'horizontal'*)
+The Stepper's orientation.
+- [linear](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/#linear) (default: `true`)
+Specifies whether users must navigate the Stepper sequentially or can skip steps.
+- [selectOnFocus](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/#selectOnFocus) (default: `true`)
+Specifies whether steps focused with keyboard arrows are selected automatically.
+- [rtlEnabled](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/#rtlEnabled) (default: `false`)
+Switches the Stepper to Right-to-Left mode.
+
+## Step Settings
+
+To add steps, populate the [items](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/) collection or specify a [dataSource](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/#dataSource).
+
+Use the following properties to customize steps:
+
+- [text](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#text)
+Indicator text. If you do not define this option, Stepper numbers steps sequentially.
+- [icon](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#icon)
+Indicator icon. Stepper prioritizes icons over the **text** property.
+- [label](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#label)
+Step caption displayed next to the indicator. 
+- [optional](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#optional)
+Adds an *(Optional)* label to the step.
+- [isValid](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#isValid)
+Allows you to indicate that user input on the step results in validation errors.
+- [disabled](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#disabled)
+Deactivates the step.
+- [hint](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#hint)
+Tooltip text for the step.
+- [template](/Documentation/ApiReference/UI_Components/dxStepper/Configuration/items/#template)
+Allows you to customize the step. This property overrides all other step properties.