Build with Lotus API page updates

[eshon]

On https://lotus.filecoin.io/tutorials/lotus/build-with-lotus-api/:

• Filecoin Signing Tools is now deprecated in favor of iso-filecoin which is actively maintained
• Both filecoin.js libraries mentioned on this page are out of date
  • JS devs can also use EVM libraries like ethers.js, etc., viem.sh for wallet/FEVM interactions
• The storage deal workflow is pretty Lotus CLI heavy… I would just convert this to all via Lotus CLI for now and remove the filecoin.js bits and move it to a new page: “Make a Storage Deal”