Add support for subclass conversions to config manager

• Subclasses of config-mappable classes can now be converted by storing the type in config
• Base commands registered to the command map now correctly report their usage
• Removed old/deprecated config manager

Fix space counting for post-argument subcommands

• Post-argument subcommands can now be run with parent arguments that are quoted with multiple spaces

Improvements for RedCommands and ItemUtils

• Add ItemUtils.skull, used to generate a player skull
• Ignore exceptions for tab argument conversion

Fix ClassCastException in ConfigManager

• Exception would be caused when trying to load a number from a config-mapped object inside a list

Add ConfigName annotation to specify the path to a value in config

This required more internal restructuring than I would like to admit

Fix collection loading to use proper YAML lists

• Added wrapper DataHolder to abstract away implementation details of storage from the converters
• Switch SQLCache to use synchronized maps, which can store null keys and values

Complete rewrite of ConfigManager

• The old config manager, and the redempt.redlib.configmanager package, are now deprecated and will be removed at a later date
• New config manager is in redempt.redlib.config
• Now can deserialize to record types (ConfigMappable annotation not required)
• No longer uses ConfigValue, all fields are automatically deserialized unless marked transient
• No longer requires ConfigManager.map/list/collection, can natively serialize and deserialize regular collections and maps
• Major code cleanup, more extensible
• Can now only deserialize to static fields in the root of the config
• Can now reload config from disk

Prepare for migration to custom build server

6.2.1.7

Prepare for migration to custom build server

Fix docs

• Javadocs should automatically be viewable in your IDE if the project is imported with maven or gradle
• Removed docs from project directory (you can still generate them with gradle if you want)

Minor fixes for ProtectionPolicy

• Fix protection for hopper minecarts so a hopper minecart outside a protection can no longer remove items from an inventory inside a protection with the CONTAINER_ACCESS ProtectionType
• Add TRAMPLE to ProtectionType.DIRECT_PLAYERS