feat: Implement versioning, use for gear sharing

[ShadowCat117]

Wynntils PR: Wynntils/Wynntils#3589
HadesServer PR: https://github.com/Wynntils/HadesServer/pull/16

[Copilot]

Pull Request Overview

Implements versioning system for the Hades protocol to support gear sharing functionality. The PR adds version tracking to authentication packets and establishes a foundation for protocol compatibility management.

• Adds HadesVersion enum with UNKNOWN and VERSION_0_6_1 values
• Modifies HCPacketAuthenticate to include version field with backward compatibility
• Implements optional version reading/writing in packet serialization

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
HadesVersion.java	New enum defining protocol versions including gear sharing support
HCPacketAuthenticate.java	Updated to include version field with backward-compatible serialization

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[Copilot]

The writeData method always writes the version, but readData only reads it conditionally. This creates an asymmetric serialization pattern that could cause deserialization issues when version is null or when communicating with older clients that don't expect the version field.

Suggested change

	buffer.writeEnum(version);
	if (version != null && version != HadesVersion.UNKNOWN) {
	buffer.writeEnum(version);
	}

[Copilot]

The single-parameter constructor doesn't initialize the version field, leaving it null. This will cause a NullPointerException when writeData calls buffer.writeEnum(version) with a null value.

Suggested change

	this.token = token;
	this.token = token;
	this.version = HadesVersion.UNKNOWN;