Add helper functions for Serial Sniffer for people to use that can delete duplicates if they so want

[madeline-scyphers]

🚀 Feature Request

After Serial Sniffer has outputted a csv, people should be able to call a helper function from the command line with the csv as a command line arg that can clean it up in various ways, such as removing duplicates. This could also be the same function that converts it to a config found in #12. Or it could be a separate one that could be used in issue #12, allowing #12 to be more powerful, but you still doing the csv cleanup standalone if you so desire.