Feature: Filebrowser service widget (#5546)

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/filebrowser.md

@@ -0,0 +1,19 @@
+---
+title: Filebrowser
+description: Filebrowser Widget Configuration
+---
+
+Learn more about [Filebrowser](https://filebrowser.org).
+
+If you are using [Proxy header authentication](https://filebrowser.org/configuration/authentication-method#proxy-header) you have to set `authHeader` and `username`.
+
+Allowed fields: `["available", "used", "total"]`.
+
+```yaml
+widget:
+  type: filebrowser
+  url: http://filebrowserhostorip:port
+  username: username
+  password: password
+  authHeader: X-My-Header # If using Proxy header authentication
+```

docs/widgets/services/index.md

@@ -33,6 +33,7 @@ You can also find a list of all available service widgets in the sidebar navigat
 - [Emby](emby.md)
 - [ESPHome](esphome.md)
 - [EVCC](evcc.md)
+- [Filebrowser](filebrowser.md)
 - [Fileflows](fileflows.md)
 - [Firefly III](firefly.md)
 - [Flood](flood.md)