Route for conversation added and Conversation Controller created.
[CONTROLLER][Conversation] Created ConversationShow function, will be used to render the conversation route page
[ENTITY][Note] Conversation id column added, this way a Note can have a direct relation with its respective conversation.
FeedController will only handle FormatNoteList if the should_format field is true.
This change was made to make the replies route feed possible, this route is added by the Conversation component. Since a reply isn't a conversation root, if the FeedController handled the FormatNoteList event, this feed wouldn't have any notes to display.
