List `allowlisted` URLs

[DecentralizedDan]

Create a slash command to list allowlisted URLs

• /show_allowlist (if you have a better idea, ping me on it!)
• List should be formatted like this:

https://phishing.com,
https://google.com,

{beginning of line}{url string}{comma}{newline}

[jmercouris]

Completed with: b18090c !