New platform Microsoft Teams (#10911)

* Created documentation for the new Microsoft Teams platform

* Added service data

* Changed from webook_url to url

* Added missing logo and changed some things after code review

source/_integrations/msteams.markdown

@@ -0,0 +1,54 @@
+---
+title: "Microsoft Teams"
+description: "Instructions on how to send a notification to a Microsoft Teams channel."
+logo: msteams.jpg
+ha_category:
+  - Notifications
+ha_release: 0.101
+---
+
+The `Microsoft Teams` platform allows you to send notifications from Home Assistant to a team channel in [Microsoft Teams](https://products.office.com/en-us/microsoft-teams/group-chat-software).
+
+## Setup
+
+To send a notification to teams, you need to add the Incoming Webhook app to your team channel. When the app is added, you will receive a webhook URL that needs to be added to your `configuration.yaml`.
+
+
+## Configuration
+
+To add the Microsoft Teams platform to your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+notify:
+  - platform: msteams
+    url: https://outlook.office.com/webhook/<ID>
+```
+
+{% configuration %}
+name:
+  description: Setting this parameter allows multiple notifiers to be created. The notifier will bind to the service `notify.NOTIFIER_NAME`.
+  required: false
+  type: string
+  default: "notify"
+url:
+  description: The webhook URL created in the setup step.
+  required: true
+  type: string
+{% endconfiguration %}
+
+### Microsoft Teams service data
+
+The following attributes can be placed inside `data` for extended functionality.
+
+| Service data attribute | Optional | Description |
+| ---------------------- | -------- | ----------- |
+| `image_url`            |      yes | Attach an image to the message.
+
+Example for posting file from URL:
+
+```yaml
+title: Title of the message.
+message: Message that will be added.
+data:
+  image_url: URL_OF_IMAGE
+```