Support CDN

[nikitosing]

in token instance structure will be new

• optional field thumbnails it has the following structure (example with full key set, it is possible that some keys will be absent due to small image size, or impossibility to upload original image):

  thumbnails: 
  {
  250x250: "https://pub-1f1ac54bb1ee4b1ab5f87ca95854800c.r2.dev/eth-sepolia-testnet/cef9dc82f65e2f8117a4edf5f4dc9d85d50d3f17_250x250.png",
  500x500: "https://pub-1f1ac54bb1ee4b1ab5f87ca95854800c.r2.dev/eth-sepolia-testnet/cef9dc82f65e2f8117a4edf5f4dc9d85d50d3f17_500x500.png",
  60x60: "https://pub-1f1ac54bb1ee4b1ab5f87ca95854800c.r2.dev/eth-sepolia-testnet/cef9dc82f65e2f8117a4edf5f4dc9d85d50d3f17_60x60.png",
  original: "https://pub-1f1ac54bb1ee4b1ab5f87ca95854800c.r2.dev/eth-sepolia-testnet/cef9dc82f65e2f8117a4edf5f4dc9d85d50d3f17_original.png"
  }

• field media_url, it contains url to image OR animation (if image is miising) media_url: "https://d3onnejkzwg1si.cloudfront.net/640x640/wolvesnfts/3/Images/1784.png"
• optional field media_type it shows content type of media_url in the following format: "image/png" media_type: "image/png"

Example: https://eth-sepolia.k8s-dev.blockscout.com/api/v2/tokens/0x467f1c548E65bC5876b95b217dC6f0DDB801C83A/instances/2837

[nikitosing]

Backend PR: https://github.com/blockscout/blockscout/pull/10675