[FR] Can return a more meaningful error message when using "ipfs cat" API

[sync-by-unito]

User story
As a developer, I wish I can get a more meaningful error message when using Numbers API

Reproduce step

1. Try "Cat metadata from IPFS Nid"
2. Input a Nid for a png file (eg. bafybeia7buylzu37ldtugql2eupy64fw3gzjqyoivgt3jyxe6d4yuggh24)
3. Get less meaningful error message like "$.respond() not called for this invocation"
4. Further information see ✓ Create API to allow users do "ipfs cat" through Numbers Gateway

Expectation
Can return a meaningful error message to let me know I need to input another Nid with a supported format.

Additional information:

┆Issue is synchronized with this Asana task by Unito
┆Created By: Sherry Chung