Write rosbag record and store scripts

[theochemel]

• [ ] A script that records vision topics in one bag, records all other topics in another bag, and names the bags with the start timestamp
• [ ] A script that copies new bags from the Jetson NVME drive to an external drive, ignoring bags that have already been copied
• [ ] A script that dumps all vision topics in a bag as MP4 videos and PNG images

[theochemel]

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