Add trivia mode to cashdrop

[aranym0]

Works similarly to maths mode - a question is sent, and if the correct response is received, the user receives the cash. Questions and answers are pulled from a new trivia.json file for sanity.

Open to suggestions and improvements, this is my first time ever working on a Red cog.

[flaree]

Hi,

Unfortunately this isn't something I am willing to add to the cog at this time. I prefer to keep it as is.

Just to note, you should use data manager instead of bundling it directly with the cog

[aranym0]

That's totally fair. I just made this for my own server and thought it might be nice to upstream. I'll just use my own fork instead then.