Figure out better method for filtering nfts to be shown on marketplace

[rynoV]

Currently the filtering is done by failing to parse the metadata from blockfrost and some other temporary fixes, see:

https://github.com/mlabs-haskell/seabug-contracts/blob/a33375d6f2c28bcba00950a912b64dc7569a9e54/src/Seabug/Contract/MarketPlaceListNft.purs#L63

Also see @nrutledge 's draft ticket in the Seabug github "project"

[samuelWilliams99]

Yeah, as discussed in the ticket, this will be offloaded to the frontend