[COMPONENTS][Posting] Call Conversation::assignLocalConversation upon
creating a new note
By using the AddExtraArgsToNoteContent event upon posting a Note, an
extra argument ('reply_to') is added before storing the aforementioned Note.
When storeLocalNote eventually creates the Note, the corresponding
Conversation is assigned.
If the source lacks capability of sending the reply_to metadata, it might be on the note content itself as a reference.
[ENTITY][Note] Documenting conversation/reply related functions. The entity Note reply_to shouldn't be trusted toknow whether or not the Note is a Conversation root. This will happen if a known remote user replies to an unknown remote user - within a known conversation.
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.
