v1.21.0

• replace json dumper and reader with orjson. For the most part this offer more customizability so that types round trip correctly. The only exception is enum values, which i have now had to add so round trip help for
• major overhaul of pose estimation: generic code is now housed in the pose module and no longer in ArUco, since it'll work with any function that provides the position of fiducial markers in screen coordinates and the corresponding object coordinates.
• aruco can now correctly handle individual markers that are from a different dict than plane markers, this is decoupled. A minimal set of dicts to handle all defined markers can be determined and used to set up the minimum number of required detectors
• video_player can now be set to detachable, which entails that it can be closed without interrupting the underlying processing
• fix various crashes