* build: update build-time dependencies, address new warnings
* build: switch to central repo declaration, remove redundant repositories
* build: use spotless predeclaration, more task avoidance on kotlin modules
This is the first part of the introduction of annotation processing to cloud. A new `@CommandContainer` annotation has been introduced, which can be placed on classes to have the annotation parser automatically construct & parse the classes when `AnnotationParser.parseContainers()` is invoked.
A future PR will introduce another processor that will scan for `@CommandMethod` annotations and verify the integrity of the annotated methods (visibility, argument annotations, etc.).
Also added some new tasks to only build/install to maven local certain platforms
`buildMinecraft`, `installMinecraft`, `buildDiscord`, `installDiscord`, `buildIRC`, `installIRC`
