Re-add /rules

You can access the rules link through /links, but you can't access it through /rules It would be good if /rules was re-implemented. If the rules are easy to find, players are more likely to follow them. I think /rules should at least bring up the link (like /links does), though also listing a few rules is something to consider. I think that having a few of the basic rules listed was a good thing. Bedrock players can't click links, and if they have to go to a browser and type out a link, they are less likely to go through the trouble of finding the server's rules.