Release v6.0.0

What's Changed

• chore(deps): Bump com.github.spotbugs from 6.5.4 to 6.5.5 by @dependabot[bot] in #350
• chore(deps): Bump com.gradleup.shadow from 9.4.1 to 9.4.2 by @dependabot[bot] in #351
• feat(deps): pin Paper API to immutable build versions, drop weekly cron by @leviem1 in #352
• chore(deps): Bump checkstyle from 13.4.2 to 13.5.0 by @leviem1 in #353
• chore(docs): Add CLAUDE.md to assist agentic development by @leviem1 in #354
• feat: Provide example command implementation using CommandAPI by @leviem1 in #355
• feat(config): Add a fully functioning config loading example by @leviem1 in #356
• fix(build): Resolve missing build files preventing plugin startup by @leviem1 in #358

Full Changelog: v5.0.1...v6.0.0