Implement Message Truncation in Chat for Long Messages

[Shruti-1910]

Description:

Currently, messages longer than 1000 characters can be sent without any restriction in chats. This can lead to a poor user experience as excessively long messages disrupt the readability of the chat interface. To enhance user interaction and readability, the app should enforce a maximum message length of 1000 characters.

Expected Behavior:

• Users should be restricted from sending messages that exceed 1000 characters in length.
• Implement validation to notify users when attempting to send messages longer than the maximum allowed character limit.