Create area.markdown (#20743)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_lovelace/area.markdown

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+---
+type: card
+title: "Area Card"
+sidebar_label: Area
+description: "The Area card gives control of your entities in a specified area."
+---
+
+The Area card lets you control and monitor an individual area.
+
+<p class='img'>
+  <img src='/images/blog/2021-12/area-card.png' alt='Screenshot of the Area card'>
+  Screenshot of the Area card.
+</p>
+
+
+To add the Area card to your user interface, click the Lovelace menu (three dots at the top right of the screen) and then **Edit Dashboard**. Click the "Add Card" button in the bottom right corner and select **Area** from the card picker. All options for this card can be configured via the user interface.
+
+Buttons will appear on the card for the entities in the area including fan, light and switch. A motion sensor icon will appear in the top left if a motion sensor is in the area and motion is detected by the motion sensor.
+
+If a camera is added to the area you can show the camera feed instead of the area pictue.
+
+{% configuration %}
+type:
+  required: true
+  description: "`area`"
+  type: string
+area:
+  required: true
+  description: ID of the `area`.
+  type: string
+show_camera: 
+  required: false
+  description: Changes the area picture to a live feed of the camera set for the area.
+  type: boolean
+  default: false
+navigation_path:
+  required: false
+  description: link to Lovelace view. For more information about views, see the [view documentation](/lovelace/views/)
+  type: string
+theme:
+  required: false
+  description: Override the used theme for this card with any loaded theme. For more information about themes, see the [frontend documentation](/integrations/frontend/).
+  type: string
+{% endconfiguration %}
+
+## Example
+
+Alternatively, the card can be configured using YAML:
+
+Basic example:
+
+```yaml
+- type: area
+  area: bedroom
+```
+
+Complex example
+
+```yaml
+- type: area
+  area: bedroom
+  navigation_path: my_bedroom
+  show_camera:true
+  theme: green
+```