Have NPC follow Player without overlap

[Andrew]

Implement a way for an NPC to follow the Player without overlapping of sprites.

Goals:

• NPC moves towards Player after they reach a certain distance
• NPC does not overlap Player and stays a certain distance away
• NPC still continues to look towards Player while following
• NPC must animate while following.

Bonus:

• NPC moves away if Player moves towards NPC
• Have MIN and MAX follow distance to make movement look more flexible.