New Repos & Updates (#26)

* Added JitPack
* Added Sonatype
* Updated dependencies
* Migrated to kotlin dsl
* Updated workflows

Signed-off-by: Francisco Solis <imfran@duck.com>

Updated SimpleCoreAPI

Fixes, Features and Improvements

* Fixed some issues when you opened the UIs
* Added extension values to the ItemStack class
* Removed Test Data
* Added taskmodule depend
* Added new onBuild function
* Fixes to the UI Click system