StructureBlockUpdatePacket: Added encode/decode

[yoraze]

Introduction

Added encode decode for StructureBlockUpdatePacket, which can be used for StructureBlockActor!

The player sends it to the server when changing the settings of StructureBlockActor.

Changes

API changes

Without API changes

Behavioural changes

Without behavioural changes

Tests

I don’t think that he is really needed here. However, I will try later to add StructureBlockActor and using the packets I will test it myself.

[dktapps]

It would be nice if someone could peer-review this and confirm the changes.

[yoraze]

It would be nice if someone could peer-review this and confirm the changes.

I have no acquaintances who could confirm this. Usually I check that others write about the protocol, and for this reason they often started contacting me for advice. :^/

[yoraze]

I don’t know if you are interested or not, but I found similar information about this packet from Sandertv.
(https://github.com/Sandertv/gophertunnel/blob/master/minecraft/protocol/packet/structure_block_update.go)

Maybe ask him to confirm or deny this PR?
I just think you know each other and he could test this PR.

[Sandertv]

I've had a look over it and it looks good. We had a talk about it on Discord.

[dktapps]

This should have been targeted at stable.
We really want to keep the protocol as consistent as possible between the branches, and since PM is a reference implementation, it's confusing to people if our implementation isn't available on the default branch.

This also needs to be rechecked against Minecraft 1.14 to ensure that it's still in line with latest changes.

[yoraze]

This also needs to be rechecked against Minecraft 1.14 to ensure that it's still in line with latest changes.

Okay, I rechecked the read/write methods of StructureBlockUpdatePacket in BDS 1.14.30.2 and made sure that nothing has changed there. I also rechecked serialize/unserialize methods of StructureEditorData and StructureSettings - there are no changes either.