Chore: Add Twitter documentation (#648)

* Chore: Add Twitter documentation

Co-authored-by: Sojan <sojan@pepalo.com>

docs/channels/twitter-channel.md

@@ -0,0 +1,32 @@
+---
+path: "/docs/channels/twitter"
+title: "How to create Twitter channel?"
+---
+
+**Step 1**. Click on "Add Inbox" button from Settings > Inboxes page.
+
+![inbox_create](./images/twitter/inbox_create.png)
+
+**Step 2**. Click on "Twitter" icon.
+
+![list_of_channels](./images/twitter/list_of_channels.png)
+
+**Step 3**. Click on "Sign in with Twitter" button
+
+![sign_in_with_twitter](./images/twitter/sign_in_with_twitter.png)
+
+**Step 4**. You will be redirected to Twitter, Click on "Authorize app" button.
+
+![authorize_twitter](./images/twitter/authorize_twitter.png)
+
+**Step 5**. "Add agents" to your website inbox.
+
+![add_agents](./images/add_agents.png)
+
+**Step 6**. Hooray! You have sucessfully created a Twitter inbox.  You will be able to manage Twitter DMs and tweets mentioning you in the Chatwoot Inbox.
+
+![finish_inbox](./images/twitter/finish_inbox.png)
+
+  **Step 7**. If you want to update the agents who have access to the inbox, you can go to Settings > Inboxes.
+
+![inbox_settings](./images/twitter/inbox_settings.png)