[WC-3263] - Add Markdown Viewer widget documentation page

content/en/docs/marketplace/platform-supported-content/widgets/markdown-viewer.md

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+---
+title: "Markdown Viewer"
+url: /appstore/widgets/markdown-viewer/
+description: "Describes the configuration and usage of the Markdown Viewer widget, which is available in the Mendix Marketplace."
+#If moving or renaming this doc file, implement a temporary redirect and let the respective team know they should update the URL in the product. See Mapping to Products for more details.
+---
+
+## Introduction
+
+The [Markdown Viewer](https://marketplace.mendix.com/link/component/230248/) widget renders markdown content from a string attribute as formatted HTML. 
+
+The widget does the following:
+
+- Displays markdown-formatted text as rendered HTML, supporting headings, bold, italic, lists, links, images, tables, code blocks, blockquotes, and horizontal rules
+- Applies typographic enhancements such as smart quotes, em dashes, en dashes, and ellipses
+- Automatically converts URLs in the text to clickable links
+- Shows a loading indicator while the data source is being retrieved
+
+### Typical Use Cases
+
+This widget is often used in use cases like:
+
+- Displaying user-authored markdown content such as knowledge base articles or notes
+- Rendering formatted text stored in a database attribute
+- Showing `README.md`-style documentation within a Mendix application
+
+### Features
+
+This widget leverages the following features:
+
+- Standard markdown syntax rendering, including headings, emphasis, lists, links, images, tables, code blocks, blockquotes, and horizontal rules
+- Typographic replacements (smart quotes, em dashes, en dashes, ellipses)
+- Automatic URL-to-link conversion (linkification)
+- Offline capable
+- Conditional visibility support
+
+### Limitations
+
+This widget has the following limitations:
+
+- The widget is read-only, and does not provide editing or input capabilities
+- Code blocks render as plain monospace text without syntax highlighting
+- Custom HTML tags within markdown content are not supported
+
+## Configuration
+
+To configure the markdown viewer widget, do the following:
+
+1. Place the widget in a data container such as a data view, list view, or template grid widget.
+1. Navigate to the **General** tab and select the **Value attribute** to use as the content source. This attribute contains the markdown-formatted text to render.
+
+{{% alert color="info" %}}
+Use an unlimited string data type for the **Value attribute** to avoid truncation of longer markdown content.
+{{% /alert %}}
+
+Optionally, you can configure the widget further:
+
+- Navigate to the **Label** section to add a label for the widget
+- Navigate to the **Conditional visibility** section to control when the widget is displayed
+
+## Styling
+
+The widget renders its content inside a container with the `widget-markdown` CSS class. The following default styles are applied:
+
+- **Tables** — rendered with borders, padding, and left-aligned text. Header cells have a light gray background
+- **Images** — render at a maximum of 35% of the container width by default
+- **Horizontal rules** — span the full width of the container
+
+You can override these styles by targeting the `.widget-markdown` class in your custom SCSS or theme.
+
+## Read More
+
+- [markdown-it](https://github.com/markdown-it/markdown-it): the markdown parsing library used by this widget