Feature: feeds widget (#7170)

docs/widgets/services/feed.md

@@ -0,0 +1,46 @@
+---
+title: Feed
+description: RSS / Atom feed widget
+---
+
+This widget shows the latest items from an RSS 2.0 or Atom feed.
+
+```yaml
+widget:
+  type: feed
+  url: https://feeds.bbci.co.uk/news/rss.xml
+  maxItems: 5 # optional - defaults to 5
+  layout: list # optional - possible values list, grid - defaults to list
+  images: true # optional - set to false to hide images - defaults to true
+```
+
+## Layouts
+
+`list` shows one row per item. Items with an image get a small thumbnail.
+
+![Feed widget list layout](../../assets/widget_feed_list.webp)
+
+![Feed widget list layout with thumbnails](../../assets/widget_feed_thumbnails.webp)
+
+`grid` shows image tiles that re-flow to fit the width of the widget, e.g.:
+
+```yaml
+- NASA Image of the Day:
+    widget:
+      type: feed
+      url: https://www.nasa.gov/feeds/iotd-feed/
+      layout: grid
+      maxItems: 8
+```
+
+![Feed widget grid layout](../../assets/widget_feed_grid.webp)
+
+## Images
+
+Images are taken from the feed's `media:thumbnail` / `media:content` tags or image enclosures, falling back to the first image in the item's content. Some feeds do not include images at all.
+
+Images are loaded by your browser directly from the feed's host, at whatever size the feed provides. Feeds that link full-size originals can be slow to load; set `images: false` for those.
+
+## Notes
+
+Feeds are fetched by homepage, not your browser, and cached for 10 minutes.

docs/widgets/services/index.md

@@ -39,6 +39,7 @@ You can also find a list of all available service widgets in the sidebar navigat
 - [Emby](emby.md)
 - [ESPHome](esphome.md)
 - [EVCC](evcc.md)
+- [Feed](feed.md)
 - [Filebrowser](filebrowser.md)
 - [Fileflows](fileflows.md)
 - [Firefly III](firefly.md)