[ENHANCEMENT] Предупреждение об обновлении API Geyser и Floodgate

Вырезка из дискорда гейзера

> Hi everyone,
>
> As mentioned in our blog post 'Looking back at 2022' we are planning to include Floodgate in Geyser at some point this year.
> We plan to include the Floodgate API in Geyser for a while to allow developers to switch to our new shared API, details about that shared API will follow in a separate announcement.
> In order for plugins to be prepared (for Geyser including Floodgate) we urge plugin developers to no longer depend on the existence of Floodgate (e.g. Bukkit.getServer().getPluginManager().isPluginEnabled("floodgate")) and instead depend on the existence of the FloodgateApi class:
```
public boolean isFloodgateApiAvailable() {
try {
Class.forName("org.geysermc.floodgate.api.FloodgateApi");
return true;
} catch (ClassNotFoundException e) {
return false;
}
}
```