[#70103368 finishes #70103004 #70103830]: add witch, add emotions and idle animations

setSpriteEmotion is a new block: normal/happy/angry/sad
Our first sprite art is added (a witch!) - though we need some adjustments on the dimensions and image content in the next drop.
Idle animations are now there - just 2 frames total, each frame lasts 2/3 of a second.

emotions and animations are only supported on the witch sprite image. there are flags that let allow us to add sprite images with/without animations, emotions, and turning frames.