implement other permission system

[Jenya705]

This PR adds the new permission system. You can register permission and verify them for specific CommandSender.

Register permission:

MinecraftServer.getPermissionManager().registerPermission(new Permission(
    "some.permission", // Permission name
    PermissionDefault.TRUE // Default behaviour of permission (TRUE, OP, OP(level) or create new using predicate)
));

Verify permission:

Player player;
boolean hasPermission = player.hasPermission("some.permission")

or

Player player;
boolean hasPermission = MinecraftServer.getPermissionManager().verify(player, "some.permission");

It is easy to change permission manager realisation using setter in MinecraftServer or ServerProcess

[TheMode]

Such change should be discussed with contributors first. The current proposal add unnecessary (and unsafe) mutability, lack thread safety, expose more than required, and remove support for entity permission.

[Jenya705]

I combined old permission system and this permission system. PermissionManager in ServerProcess is final.

And maybe fix thread safety

[KrystilizeNevaDies]

Closed due to mass conflicts. Feel free to reopen and fix them.