Current requirements for per-player generators: Paper server on 1.19.3+ with packetevents installed. Normal generators will work the same.

- Added server side calculations for break time, player distance/facing from/at block. This fixes exploits from fake packets from clients.
- Fixed exception on servers not running paper
- Fixed exception on servers without packetevents installed
- Fixed per-player generators being able to be created on servers which where missing requirements.
- Fixed per-player generators blocks disappearing when mining a non-harvestable stage.