Add operator for timestamped replay of video data #151
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This PR adds a new video capture operator for timestamped replay of video data acquired by the Aeon system. It assumes frame metadata is provided next to the video file and by default performs automatic grayscale conversion so that the output format is identical to the video streams coming in from cameras during live acquisition workflows (this conversion is exposed as an optional parameter for future color camera or alternative color format support).
The aim is to provide support for testing video processing workflows and also enabling offline post-hoc conversion of derived video datasets.