migrate-from-w32023-to-mime

[gobengo]

Motivation:

• export the list entries from w3 list --json to an internet message stream
• prototype the idea of encoding many uploads into one file using this format. not sure we need it but i may come back to it.

Done

• old uploads as ndjson -> a multipart/mixed file - i.e. 'migrate to mime'
• old uploads as ndjson -> no output, but fetches part CARs for each upload, decodes file, writes to local fs dir - i.e. 'migrate to local fs'

Usage

migrate-to-w3up on  migrate-to-rfc822 [?] is 📦 0.0.0 via ⬢ v20.10.0 
⚡ npx @web3-storage/w3 list --json | migrate-from-w32023-to-mime --fetchParts > bengo.web3.storage.rfc822
wrote /dev/stdout

migrate-to-w3up on  migrate-to-rfc822 [?] is 📦 0.0.0 via ⬢ v20.10.0 took 14.0s 
⚡ head -n10 bengo.web3.storage.rfc822                                                       
Content-Type: multipart/mixed; boundary=45rl8rend6w; type=multipart/mixed

--45rl8rend6w
content-disposition: attachment; filename="bengo-test-report.html.bafybeia6bzetwmjngw4laf64fcnqiobhw2g5shbpg2rfrnxr2ylbxwrkhy.ipfs"
content-type: application/vnd.web3.storage.car+json;version=2023.old.web3.storage
content-id: ipfs:bagaaieraqclftv4bxsjhag4qqkwhlb6t3bd2s2frvzzq6o5aliye6y3bo3rq

{
  "_id": "315318962451059099",
  "type": "Car",

[gobengo]

blocked on testing against old.web3.storage until web3-storage/web3.storage#2347

[gobengo]

continuing sans MIME stuff over here #3