[📦] Chunk Copy (Fabric)

This is a small update that changes the chat feedback message for copying, pasting, and filling chunks to show the number of affected chunks. Below is an example:

• Example before: [Chunk Copy] Copied chunk data to 'Test'.
• Example now: [Chunk Copy] Copied 105 chunks to 'Test'.

The number of chunks that will be affected depends on the current render distance as well as the number of currently loaded chunks.