* feat: add MESSAGES_UNREAD event and implement unread action in ConversationsController
* feat: rename MESSAGES_UNREAD event to CONVERSATION_UNREAD and update unread action in ConversationsController
* feat: implement send_unread_conversation method and update conversation_unread event handling
* feat: add test for dispatching conversation.unread event in ConversationsController
* feat: add conversation_unread event handling in ChannelListener
* feat: add send_unread_conversation method and corresponding tests in Whatsapp channel
* feat: add logging for nil last_message in send_unread_conversation method
* feat: add send_unread_conversation to error handling methods
* feat: implement send_unread_conversation method with logging for nil last_message
* fix: add nil check and logging for last_message in send_unread_conversation method
* fix: update conversation_unread method to call unread_conversation instead of send_unread_conversation
* refactor: rename send_unread_conversation to unread_conversation and update method implementation
* refactor: rename send_unread_conversation to send_unread_messages and update implementation to handle multiple messages
* refactor: rename send_read_messages to read_messages and send_unread_messages to unread_message for clarity
* refactor: rename send_read_messages to read_messages and send_unread_messages to unread_message for clarity
* refactor: rename send_read_messages to read_messages for consistency
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