Feature: no autobalance if the player level is to low

### Describe your feature request or suggestion in detail

An option to enable auto-balancing when the player level is X level above the dungeon level.
As long as the player level doesn't reach this threshold, auto-balancing is disabled.

### Describe a possible solution to your feature or suggestion in detail

_No response_

### Additional context

_No response_

The issue names no files, tests, or entry points. Start by locating the module's existing auto-balancing decision and the code that provides player and dungeon levels. Done means an option can set the level difference threshold and auto-balancing remains disabled below that threshold.

Written by the indexing model from the issue text.