Export files from Roam

[rbrcsk]

I want to save a local copy of all files I upload to Roam. After #1 is finished

• Go through all markdown files and collect URLs
• For each URL:
  • Create a unique ID that does not change between runs (ie hash it)
  • Replace the URL with the new reference images/{id}.{ext}
  • Add to a list of URLs
• For each URL in the download list
  • Check if the file exists locally and skip if it does
  • Download the file if it doesn't

Optional:

• Do this replacement in the json file too
• Generate a files.json file that documents the original vs replaced URLs, and the files it occured in.