Updates to Video Inference Tool - Streaming detections to disk

[Jordan-Pierce]

Description

• Fix bug: crash when setting output directory
• Stream out detections / polygons to disk (CSV, JSON) w/ labels, confidence scores, tracking IDs (need to make re-importable to CoralNet-Toolbox)
• Keep regions functionality, but make modifications as needed to interactions
• Look at including patch-based image classification in Video Inference
• Eventually, make sweeping changes as needed, would like to include YOLO-3D with depth estimation

[Jordan-Pierce]

Might look at scrapping this entirely in favor of having an upgraded AnnotationWindow + VideoPlayer. That way users can annotate images (as they do now), but could also import videos, be able to play them in the MainWindow, but then pause and annotate individual frames as they would with images.

Things to think about:

• How to store annotations within video so they display quickly while video is running (and also predictions)
• How to store the annotations from video in the Project JSON file (this might need a total makeover anyways)