Implemented a default scanradius tab-complete, closes #2
Config checks are done on startup and on reload for performance purposes
Implemented bossbar
Added .gitignore file
Please note: due to the current amount of buggs on MC 1.14; /scanradius may drop the server's TPS when executed with a large radius. Chunk loading is done with an average of 20 chunks per second. This should be reasonable for each server to handle.