Added images to chat docs (#145)

* Added images

* More images

chat.mdx

@@ -3,6 +3,8 @@ title: 'Chat'
 sidebarTitle: 'Overview'
 ---
 
+<Frame>![Chat hero image](/public/images/chat-hero.png)</Frame>
+
 _Chat is currently in Beta. This will not effect the reliability of this feature but we are heavily iterating and improving on the featureset._
 
 Our Chat widget lets you embed a live chat interface on your website or app, allowing your customers to reach out to you without leaving your site. You can then respond to these messages directly from Plain.

chat/customization.mdx

@@ -2,10 +2,15 @@
 title: 'Customization'
 ---
 
+<Frame>![Customise chat](/public/images/chat-customisation.png)</Frame>
+
 ## General customization
 
 You can customize the chat widget to match your brand and user experience. You can change various aspects of the chat widget including both the appearance and behavior.
 
+
+
+
 <Accordion title="General customization code">
   <Snippet file="chat/customization.mdx" />
 </Accordion>
@@ -34,6 +39,8 @@ set a label based on the page the user is on.
 
 ### Chat buttons
 
+<Frame>![Chat buttons image](/public/images/chat-button-customisation.png)</Frame>
+
 You can configure the primary chat button and any additional chat buttons that appear on the intro screen with text and an icon using the `chatButtons` array.
 
 You can also pass `threadDetails` to a chat button to set fields on the thread when the user creates a chat from that specific button. If you provide the same field
@@ -45,6 +52,8 @@ in both the top-level `threadDetails` and a chat button, any single value fields
 
 ### Chat forms
 
+<Frame>![Chat forms image](/public/images/chat-forms.png)</Frame>
+
 Similar to chat buttons, chat forms allow you to set fields on the thread when the user creates a chat. These are specific to each `chatButton`.
 
 <Accordion title="Chat forms code">