Auto detection with AI

[mkcarl]

Train a YOLOv8 model, convert it to tensorflow.js and put the detection right into the browser. On annotation task, integrate AI such that

• there is a button to toggle AI assistance
• show AI processing or not
• allow user to choose whether accept AI suggestion or not
• make sure db records that it is AI annotated

[mkcarl]

Added basic detection for assisting bounding box detection in #19.

the model inference runs so fast that its not even feasible to put a loading state while model is processing.