Update to r/Louisville rules, including ban of Twitter/X links

After overwhelming support of active users in favor of banning Twitter/X links, this subreddit will now ban all links to that website. I know there will be big feelings on either side of the banning of X.com links. We can revisit this matter later but for now the decision is final. Thank you to everyone who gave their input on the matter.

Additionally, we have made some minor updates to the subreddit rules. There were some rules we removed and some we just tweaked a little. Specifcially we got rid of the pet post rule because that didn't seem to have any relevance anymore. We also updated the Self Promotion rule to exclude community events. And we are hoping to direct job seeking posts to our Weekly Classifieds Thread in the Community Highlights section of the sub.