Add event platform to ntfy integration (#38726)

Co-authored-by: c0ffeeca7 <38767475+c0ffeeca7@users.noreply.github.com>

source/_integrations/ntfy.markdown

@@ -3,6 +3,7 @@ title: ntfy
 description: Instructions on how to integrate ntfy with Home Assistant.
 ha_category:
   - Notifications
+  - Event
 ha_iot_class: Cloud Push
 ha_release: 2025.5
 ha_config_flow: true
@@ -14,6 +15,7 @@ ha_platforms:
   - diagnostics
   - notify
   - sensor
+  - event
 ha_quality_scale: bronze
 ---
 
@@ -102,6 +104,33 @@ data:
 
 {% enddetails %}
 
+## Events
+
+An {% term event %} {% term entity %} is created for each configured topic. These entities subscribe to their respective topics and receive notifications from the **ntfy** service in real-time. Each event entity exposes the full contents of the notification through its attributes. These attributes include links, attachments, tags, and other metadata.
+
+You can use {% term event %} {% term entities %} in automations. For example, to trigger actions in Home Assistant, or to forward notifications to other devices for further processing or alerting.
+
+{% details "Example YAML configuration" %}
+
+{% raw %}
+
+```yaml
+triggers:
+  - trigger: numeric_state
+    entity_id:
+      - event.mytopic
+    attribute: priority
+    above: 4
+actions:
+  - action: notify.mobile_app_your_device
+    data:
+      message: "Received new ntfy notification"
+```
+
+{% endraw %}
+
+{% enddetails %}
+
 ## Actions
 
 ### Publish notification