As a User I want to validate if metadata is HIP-412 compliant

[michalrozekariane]

Acceptance criteria:

• the SDK can validate an array of objects
• the SDK can validate local directory with JSON files (using validation of an array of objects)
• the SDK can validate single, local JSON file (using validation of an array of objects with single entry)
• the SDK can validate all NFTs JSON metadata from an on-chain collection
  • Download collection metadata to memory
  • validate locally (using validation of an array of objects with a single entry)
• the SDK can validate single, on-chain NFT metadata (using validation of an array of objects with single entry)
• the SDK should return:
  • an object that contains validation errors
    • In case of non-compliant files/nfts, it should have a separate object with errors for each non-compliant file/nft.
  • a success flag that should be true if there are no validation errors
• the validation logic should try to use code from hedera-nft-utilities / mintbox