Improve chat search with no defined chat room

After we searched a user that we haven’t started a chat room with, it throws a room not found error which is technically correct but for better user experience we should create a chat room with the selected user rather than throwing an exception.

https://sharing.clickup.com/clip/p/t9004002740/b5c299b9-0464-4eea-b8f9-afaf58991561/b5c299b9-0464-4eea-b8f9-afaf58991561.webm?filename=screen-recording-2025-08-25-20%3A26.webm