Add different behaviour stance for pets

In the same UI you open to see the pet's perk tree, there could be another window showing the behavior of the pet regarding how to act against enemies. Examples could be:

Actively aggressive: Attack any enemy on sight (in the active screen)

Focused aggression: Attack only the enemy the character is currently attacking or the last enemy the character has attacked

Standard: Only attack if the character is actively in combat (was attacked or is attacking). Randomly chooses between the nearby enemies (kinda how it is now)

Passive: Never attack enemies regardless of player behavior or state (in combat or not)