Working Linkback with !quotes and improved info/display

[SimplyJpk]

• Linkback works in discord now without opening the browser
• If attachment/image on a quote, adds a small camera emote to indicate as such. (Quote used to fail if a quote had an attachment/image)
• If quote is only an image (no message context), message is crossed out but an emote is sent to indicate it is only an image.
• Quotes are ignores if author of message is bot.

Note: It is possible to attach the image from the quote to the embed, but this adds additional delay, and could be spammy, or even problematic if people quote from nsfw channel, so I decided to go with just showing that the quote has an image. With the linkback working, it isn't so much a pain to go look at the original source.

I've tested and works without error.

[Pierre-Demessence]

Closing as the branch has been polluted