[SECURITY] Educate new players on Minecraft Server Security

A lot of Minecraft servers, are run by individuals who do not know much about dedicated server hosting. There exists a lot of server scanners that scan the internet for open Minecraft servers which do not have proper security measures like whitelists, for example, in place. A warning about 3rd party play already exists, but server owners often do not know how to use commands properly and as a result do not know how to whitelist people. Some do not know a whitelist feature exists and their servers often get griefed easily.

A simple toast/notification can show up when a player joins a server that is not whitelisted and the player is /op-ed, which will lead to the players list, where /op-ed players can easily turn on whitelist and add players to the whitelist, or can at the very least, redirect to a Minecraft support page that shows people how to secure their servers and add a whitelist. The toast could be like "This server is not whitelisted! Press L to secure your server" or something similar

This will genuinely help new people, who do not know much about Minecraft and computers in general, prevent being victims to griefers and server scanners