Smart Targeting for Closest/Random

[markdwags]

This PR introduces Smart Targeting capabilities for closest and random target selection, plus some potential performance enhancements.

With Smart Last Target & Smart Targeting for closest and random enabled, when you use target a non-friendly, it will update your last harmful target instead of both harmful and beneficial. When you target a friendly target, it will update your last beneficial instead of both harmful and beneficial.

Along with refactoring the code so duplicate logic isn't spread across the codebase, consolidated all the duplicate filtering logic into centralized methods. The targeting proximity code is now more organized with clear separation of concerns between filtering, selection, and processing.

Also when determining the closest, the square root operation is dropped for better performance when calculating distances.