NexusCore

Bugfix for the auto-updater. Added a temporary notification system if the error occurs again.

• Updated auto-updater to support specific Java versions
• Added /nc checkupdates command

• Added Folia development-related features

• Removed analytics (unused)
• Edited auto-updater for premium plugin support

• Added Folia support

Not very useful right now, but will be used to make other plugins of the studio Folia-compatible in the future

• Further improved auto updater