Lectern should be able to set has_book directly

[TWME-TW]

Is your feature request related to a problem?

I can set has_book to true directly through debugstick, but not through org.bukkit.block.data.type.Lectern. Obviously We need a method to set this value directly.

Describe the solution you'd like.

Add a setHasBook(boolean)

Describe alternatives you've considered.

Use Server.createBlockData(java.lang.String) to create a Lectern with a specific has_book value

Other

No response

[Lulu13022002]

Looks good however it's a little bit weird how those are missing since the impl is autogenerated by spigot. I will fix those in the generators branch for now but in the future stuff like this will be accessible through the property directly: #7223