getChathHistory added

Author: faisal004

docs/api/Chat/getChatHistory.md

@@ -0,0 +1,18 @@
+### getChatHistory
+
+Requests and retrieves the chat history from a websocket connection. This function sends a request for chat history and listens for a response message containing that history. It returns a promise that resolves with the chat history data once received.
+
+#### Syntax
+
+```javascript
+codebolt.chat.getChatHistory(): Promise<any>
+```
+
+
+#### Parameters
+This function does not take any parameters.
+
+
+#### Returns
+
+Returns a `Promise` that resolves with the chat history data, which is the response to the `getChatHistory` request, when a message of type `getChatHistoryResponse` is received.