Updated Thief Animations

[X]  Added MOVING animation for Thief
[X]  Added ATTACKING animation for Thief
[X]  Added SFX for Thief attack
[X]  Fixed an animation bug with melee units
Revert "Updated Thief Animations"

This reverts commit c69e50cdac7c2738d03a1dff1a24c002074aaae9.