Get safe server status in NCR

[doclic]

Mods like NoChatReports by Aizistral warn users when enforce-secure-profile is on.
This feature is great to have when using such mods, but it creates an issue with the "Chat messages cannot be verified" popup blocking used in NE:
the popup blocking works by telling the client that enforce-secure-profile is on, even if it's off.
This results in NCR users getting false warnings on servers using NE or similar plugins.
The Minecraft protocol has a feature call plugin messages (see wiki.vg/Protocol) that we could use to fix that.
This would require discussing not only with the NCR devs, but also every main anti MS censorship plugin maker to make a standard plugin message sent to clients on login.

[doclic]

Update: We should set preventsChatReports to true in the ping packet response

[V1nc3ntWasTaken]

Needs extra attention to modify cached ping responses in the server