Add Sign#setOperatorFeaturesAllowed #14447

Is your feature request related to a problem?

Yes. We have a command to edit text on signs with MiniMessage format, and we can use click:run_command tag in it, but the sign will not execute any command by default, because Mojang added a allow_op_features NBT tag in 26.3s4 to every sign w/ default value false. And there's no way to change that value to true via API.

Describe the solution you'd like.

Add Sign#setOperatorFeaturesAllowed, similar to the existing methods (Sign#setWaxed, Sign#setGlowingText, ...).

Describe alternatives you've considered.

Server#dispatchCommand(Server#getConsoleSender, "data merge block ... {allow_op_features: 1b}")

Other

I think that ability to change the default value of allow_op_features via per-world configuration would also be useful.