Various Updates

[LossyDragon]

Description

Kind of a glob of tweaks and fixes I decided to look into on a weekend.

• Add some tests to ensure ipv6 and scheduletasks work.
• Add/Fixup some kDoc
• Port event package files, HardwareUtils, and ScheduledFunction to Kotlin
• Bounds check in MemoryStream for seek() and setPosition()
• Rework Various classes to be more async hardend.
• Made SteamClient a closable so .close() can be used to shutdown defaultScope.

Breaking:

• JavaSteam is now targeting JDK 17
• DepotDownloader: DepotItems now use a Builder pattern.
• DepotDownloader : Various improvement to the downloading feature which eliminates batching. Parallel manifest processing, and natural backpressure depending on maxDownloads and maxFileWrites.

Checklist

• Code compiles correctly
• All tests passing
• Samples run successfully
• Extended the README / documentation, if necessary