Feature: ntfy widget (#6601)

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

docs/widgets/services/ntfy.md

@@ -0,0 +1,36 @@
+---
+title: ntfy
+description: ntfy Widget Configuration
+---
+
+Learn more about [ntfy](https://github.com/binwiederhier/ntfy).
+
+This widget shows the latest notification for a ntfy topic, including the title or body, priority level, and when it was received. Works with both self-hosted ntfy instances and the public [ntfy.sh](https://ntfy.sh) service.
+
+Allowed fields: `["title", "message", "priority", "lastReceived", "tags"]`.
+
+Default fields: `["title", "message", "priority", "lastReceived"]`.
+
+If more than 4 fields are provided, only the first 4 are displayed.
+
+## Authentication
+
+ntfy supports both public and private topics. For private instances or access-controlled topics, you can authenticate using either a **Bearer token** (ntfy access token) or **Basic auth** (username/password).
+
+| Auth Method  | Config Fields                  | Notes                             |
+| ------------ | ------------------------------ | --------------------------------- |
+| None         | _(omit key/username/password)_ | For public topics                 |
+| Bearer token | `key`                          | ntfy access tokens (`tk_` prefix) |
+| Basic auth   | `username` + `password`        | Username/password credentials     |
+
+See the [ntfy documentation](https://docs.ntfy.sh/config/#access-control) for details on access control.
+
+```yaml
+widget:
+  type: ntfy
+  url: http://ntfy.host.or.ip:port # required
+  topic: mytopic # required
+  # key: tk_accesstoken # optional — for token auth
+  # username: user # optional — for basic auth
+  # password: pass # optional — for basic auth
+```