Add support for WaterdogPE xuid and IP

[funniray]

This PR adds support for the Waterdog_XUID and Waterdog_IP fields in the ClientChainData when settings.waterdogpe is true. The functionality is similar to how Spigot deals with Bungeecord.

As there were changes to the lang folder, commit f6f851b would also need to be merged. Shouldn't be needed for PowerNukkit

This is the same PR as CloudburstMC/Nukkit#1986, just adapted to PowerNukkit.

[alikindsys]

Please open a pull request for f6f851b on https://github.com/PowerNukkit/PowerNukkit-Languages since that change is a requirement for this pull request

[funniray]

Sorry, didn't realize that languages were handled differently on power-nukkit vs cloudburst's nukkit. I've went ahead and just added the option to default-nukkit.yml instead.

[irrld]

I think it would look cleaner if you rename Waterdog_IP and Waterdog_XUID to waterdogIP and waterdogXUID

[LoboMetalurgico]

Hello, thanks for your Pull Request. Our team will make a small change to the isWaterdog function, where we will move it to the server class, so that we can expose it to the plugins.

You don't have to worry about anything and we thank you for making this implementation!

[LoboMetalurgico]

Thank You!