docs: adds churned destination catalog documentation

Author: martijn-churned

src/connections/destinations/catalog/churned/index.md

@@ -0,0 +1,50 @@
+---
+title: Churned Destination
+---
+
+[Churned](https://www.churned.io/?utm_source=segmentio&utm_medium=docs&utm_campaign=partners){:target="\_blank”} is an AI-powered customer success platform for subscription businesses, eliminating the need for rule-based decision making with live AI-driven actions. It uses machine learning to predict churn and drive customer retention.
+
+This destination is maintained by Churned. For any issues with the destination, [contact the Churned Support team](mailto:[email protected]).
+
+## Getting started
+
+1. From your workspace's [Destination catalog page](https://app.segment.com/goto-my-workspace/destinations/catalog){:target="\_blank”} search for "Churned"
+2. Select "Churned" and click **Add Destination**
+3. Choose which Source should send data to the "Churned" destination.
+4. Enter the **API Key** you've received from Churned in the "Churned" destination settings in Segment.
+
+## Supported methods
+
+Churned supports the following methods, as specified in the [Segment Spec](/docs/connections/spec).
+
+### Page
+
+Send [Page](/docs/connections/spec/page) calls. For example:
+
+```js
+analytics.page();
+```
+
+Segment sends Page calls to Churned as a `pageview`.
+
+### Identify
+
+Send [Identify](/docs/connections/spec/identify) calls. For example:
+
+```js
+analytics.identify("userId123", {
+  email: "[email protected]",
+});
+```
+
+Segment sends Identify calls to Churned as an `identify` event.
+
+### Track
+
+Send [Track](/docs/connections/spec/track) calls. For example:
+
+```js
+analytics.track("Login Button Clicked");
+```
+
+Segment sends Track calls to Churned as a `track` event.