[Meta] Introducing ignorelist for the Reddit BAPC Reposting Bot

As you might see, we've had a multiple spam posts that made it through Reddit and got reposted by the bot. There was no way to determine if a post was spam or not.

To partially alleviate this, I added a ignore list here: https://github.com/poutinetown/reddit-sales-repost-bot/blob/main/ignored.txt

If you want to add something, please make a pull request (very easy with GitHub UI, you can learn here) that only modifies the ignored.txt file by adding a new line, and briefly describe the reasoning.

If you feel a URL has been unjustly added there, please open an issue and I will remove if it makes sense. So far, the URLs were based on the removed posts.