FEATURE: Exclude posts containing specific search terms

[StuBlad]

In my FFXIV feed, it picks up a lot of posts using a lot of search terms and most are fine, but there's a specific chunk of the community who include common search terms and use them with something else nsfw.

I'd love to have the ability to exclude a post that contains a search term that I add to a list.

For example, FFXIV would be okay in a post but if the post contains both FFXIV and NSFW, I'd like to be able to have Contrails detect the good search term with the bad one and exclude that post from the feed.

It'll be a useful tool to clean up posts that don't entirely match what the feed creator desires to show up.