Fix underline formatting on Hytale 0.5

[Jhiynn]

Summary

• Avoid a hard runtime dependency on com.hypixel.hytale.protocol.MaybeBool when applying underline formatting.
• Resolve FormattedMessage.underlined at runtime so TinyMessage works with both the older MaybeBool protocol shape and the newer Boolean field used by Hytale 0.5.x.
• Update the compile-only Hytale Server API version to 0.5.0 because the previous 2026.01.24-6e2d4fc36 artifact is no longer available from the release Maven repository.

Why

On Hytale 0.5.x, MaybeBool no longer exists in com.hypixel.hytale.protocol. Parsing a message with underline formatting, for example <u>text</u>, can throw:

java.lang.NoClassDefFoundError: com/hypixel/hytale/protocol/MaybeBool

This happened while TinyMessage was used by BerryChat, and the exception was raised from TinyMsg.createStyledMessage while handling a custom UI link click.

Testing

• ./gradlew.bat clean build
• JShell probe against Hytale Server 0.5.0: <u>hi</u> sets FormattedMessage.underlined to Boolean true.
• JShell probe against Hytale Server 0.4.0: <u>hi</u> still sets FormattedMessage.underlined to MaybeBool.True.

[Zoltus]

Thanks for the pr. Does it stil lwork with the latest? I might merge it,
Anyways This project is a mess and there is 10x better ways to do this, I just made it quick so I could get colors working easily. I should redo the whole thing.

[Jhiynn]

Works. But my Agent did everything automatically. So should review it.