Added

• Added queued vein processing that mines connected blocks in small batches each tick to reduce lag spikes.
• Added per-world control using enabled_worlds and disabled_worlds.
• Added /veinminer mode <ore|tree|both|off> so players can switch between ore-only, tree-only, both, or fully off.
• Added a configurable queue_batch_size setting for tuning processing smoothness and speed.
• Added separate command settings for the new mode subcommand.

Changed

• Split mining cooldown behavior into separate settings: ore_cooldown_seconds and tree_cooldown_seconds.
• Updated cooldown handling so ore actions and tree actions now use independent cooldown timers.
• Updated /veinminer toggle behavior to switch between off and both mode.
• Updated /veinminer status and /veinminer help to include the new mode and cooldown details.