Unfurl Discord links in more places

[ChrisLovering]

In #1446 we made the bot unfurl and message links found in reported incidents. This sends a webhook with details on the message referenced.

This is incredibly useful, especially for people on Android, where Discord links are completely broken.

I would like to request that this feature is extended to at least all staff channels, with the option to whitelist additional channels/categories if needed.

As a brief spec, the bot should look for Discord links in all messages in staff channels, for each link found the bot should send an embed similar to below.

See the linked PR for reference on how this was done. We should likely make this logic a shared util.

[lemonsaurus]

I'm in full support of this suggestion. This would alleviate much of my frustration when Discording on my phone. In fact, I'm raising the priority on this. This is really crucial for user experience right now.

[Shivansh-007]

Could I get assigned on this, I have already started working on it, just forgot to get myself assigned here.

[wookie184]

Is this still something we want? Discord links on Android are much improved now (for me at least).