Create component description for KIWI Platform

see PR home-assistant/core#12304

source/_components/lock.kiwi.markdown

@@ -0,0 +1,33 @@
+---
+layout: page
+title: "KIWI Lock"
+description: "Instructions on how to integrate KIWI Smart Lock and Smart Entry."
+date: 2017-08-13 17:25
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: Lock
+featured: false
+
+ha_release: 
+ha_iot_class: "Cloud Polling"
+---
+
+The `KIWI` platform allows you to open your KIWI Smart Locks and Smart Entry Devices. 
+All you need to get started is a KIWI account. Register at [the KIWI website](https://kiwi.ki/login/).
+
+## {% linkable_title Configuration %}
+
+```yaml
+# Example configuration.yaml entry
+lock:
+  - platform: kiwi
+    username: mail@example.com
+    password: mySecretPassword
+```
+
+Configuration variables:
+
+- **username** (*Required*): The username of your KIWI account.
+- **password** (*Required*): The password of your KIWI account.