Refactor ListNft to be faster #11
Description
The ListNFT contract here currently queries for nft information sequentially and thus is very slow for loading the front page.
Refactor this contract such that the queries happen in parallel.
This task also includes any other small-ish performance refactors within the various query endpoints. If you spot anything that looks to be slow, fix it up and mention it as a bullet point list in the draft PR