feat: Structured Components

[Ukinee]

Implementation of (some) Structured Components in InventorySlot.
Client no longer crashes from creative menu items.

Todo:

• Implement other components
  • Implement TextComponent
  • Implement Identifier
• Write tests for components encoding/decoding roundrip
• Rewrite codegen to macro?
• Add values validation
• Add enums

---

I HAD TO MODIFY THE `test_slot_encode_decode_roundtrip` DUE TO ASYMMETRIC PROTOCOL FOR COMPONENTS

When decoding client data, the client sends an extra byte after the component ID.

What the client sends:

55 0 40 1 180 8 1 0 42 5 1 24 0 0 0

where

55 0 40 1 180 8 1 0 // slot data
42 // component id (potion effect)
5 // undocumented byte (i think its length prefix for payload)
1 24 0 0 0 // component payload

However, when sending data to client, it is expected to be encoded exactly as documented:

55 0 40 1 180 8 1 0 42 1 24 0 0 0

If the length byte is included in server to client packets, the client crashes with a decoding error.

But the test expects the protocol to be symmetric (tests object -> bytes -> object), so it crashes when it tries to read more bytes than are available.