Cesium Storage Format

What's Changed

• Allow to run on Minecraft 1.21 prereleases
• Update zstd to version 1.5.6
• New submenu in edit world screen that hosts all maintenance tasks
• Add new button in maintenance screen to start compaction of database
• Add new server startup flags to start conversion of worlds on the dedicated server [#5] (--cesiumConvertToAnvil, --cesiumConvertToCesium)

Known issues

• There are currently no known issues

Full Changelog: 0.2.1+1.20.6...0.2.2+1.20.6+1.21