Shulker Backport

Backport of the 1.17 Shulker spawn/duplication mechanics to 1.16.

Name		Name	Last commit message	Last commit date
Latest commit History 1 Commit
.github/workflows		.github/workflows
gradle/wrapper		gradle/wrapper
src/main		src/main
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
build.gradle		build.gradle
gradle.properties		gradle.properties
gradlew		gradlew
gradlew.bat		gradlew.bat
settings.gradle		settings.gradle

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