Embed message links

Give message links an embed so it gets more attention in the chat.

Embed features:

- Not in server where message is:

     - If the server is public, it will display the message.

     - If the server is private, it will say something along the lines of "Cannot see this message due to the server's privacy settings" or "Cannot see this message because you aren't in the server".

- In the server where the message is:

     - It will embed the message.

What should the embed look like?:

     - It should display the author's profile picture, author's username, the message, and anything attached.