Similar as with call-tokenuri, we should make getting an IPFS link a generic extractor strategy too

[TimDaub]

• see the https://github.com/neume-network/strategies/tree/main/src/strategies/call-tokenuri strategy and how we're using it in https://github.com/neume-network/data/blob/main/steps/2.mjs
• But we don't need to have a strategy that implements both extractor and transformer
• We could also have purely an IPFS extractor strategy instead of relying on the factory pattern
• take this https://github.com/neume-network/strategies/tree/main/src/strategy-factories/get-ipfs-tokenuri and make it into a configurable strategy that we define in e.g. data/steps/2.mjs

//cc @il3ven because you've been leading this so far