[Fix] Block Placer placed blocks dropping relics

[JustAHuman-xD]

Changes

• Moved the body of MiningListener#onBlockPlace to a new method MiningListener#handlePlacedBlock
• Updated MiningListener#onBlockPlace to use that method
• Added another MiningListener#onBlockPlacerPlace that listens to BlockPlacerPlaceEvent it calls MiningListener#handlePlacedBlock

Related Issues

N/A

Checklist

• I have fully tested the proposed changes and promise that they will not break world generation, mob spawning, and the like.
• I followed the existing code standards and didn't mess up the formatting.
• I did my best to add documentation to any public classes or methods I added.
• I have added Nonnull and Nullable annotations to my methods to indicate their behaviour for null values