document requirements for every 5chan default board

[plebe1us]

• 99.9% uptime
• content, basic moderation rules, nsfw/sfw status must be the same as 4chan's respective board
• have mod queue enabled for all new users that haven't posted to your board already (not sure how challenge should be set up for this; discussion: https://t.me/plebbit/693215)
• requirePostLinkIsMedia truthy
• auto-archive (lock) enabled for posts over page 10 in active sort feed (this feature is not in the backend API yet)
• pseudonymity mode must be enabled to either per-post if the respective board on 4chan uses IDs, or per-reply if it doesn't use IDs.