[Feature]: Add support for `PacketBlock.close()` through `AutoCloseable`

[Bishops-exe]

Summary

Add support for PacketBlock.close()

Problem This Solves

This allows the user to write code like this:

import lombok.Cleanup;

@Cleanup PacketBlock block = blockManager.createBlock(location, Material.OAK_SIGN.createBlockData());

or also using try statements

Proposed Solution

Make PacketBlock implement AutoCloseable

Alternatives Considered

No response

Additional Context

No response

Priority

Low – nice to have