docs(v5): add active window scrolling & min length infos

Author: Ly-sec

src/content/docs/v5/bar/widgets.mdx

@@ -110,6 +110,27 @@ group_by_workspace = true
 
 ---
 
+## `active_window`
+
+Shows the active window icon and title for the current output.
+
+| Setting | Type | Default | Description |
+|---------|------|---------|-------------|
+| `min_length` | number | `80` | Minimum widget length in pixels |
+| `max_length` | number | `260` | Maximum widget length in pixels |
+| `icon_size` | number | `14` | Icon size in pixels |
+| `title_scroll` | string | `"none"` | Title scrolling mode: `"none"`, `"always"`, or `"on_hover"` |
+
+```toml
+[widget.active_window]
+min_length = 80
+max_length = 260
+icon_size = 14
+title_scroll = "on_hover"
+```
+
+---
+
 ## `control-center`
 
 Opens the control center panel on click.