Implement functionality for uploading data to VegBank

[regetz]

Outcome

Users should be able to use vegbankr to upload data to VegBank, provided they have prepared their data in a manner that conforms with the VegBank loader schema for any given endpoint.

Details

• Implement core internal and generic functionality for:
  • Writing data into the Parquet format expected by the VegBank API upload endpoints
  • Constructing the necessary request object
  • Sending the request to the VegBank API
  • Handling the API response in such a way that errors, messages, and informative information (e.g., details about what was uploaded) are usefully reported back to the user
• Implement convenience wrappers for available endpoints, with arguments that make it clear what data table inputs and required and what additional data table endpoints are optionally permitted