[Suggestion] Auto-place Torches

Good day people! I would like to suggest an auto-place function for torches so that while mining, you won't worry mobs spawning behind you or previous tunnels you built :)

#autotorch (on/off auto torch)
#autotorchradius (specifies what light level will the torch be placed on)

Adding this suggestion will make less worries for mobs while afk'ing. Although #avoidance has this, adding light while mining is better. It also guides your way.

Start by reading the existing #avoidance behavior and the command handling for #autotorch and #autotorchradius; the issue names no files or tests. Clarify placement triggers, light-level semantics, and interaction with mining before implementation, then verify the feature respects its on/off setting and requested radius.

Written by the indexing model from the issue text.