Support Metadata Key

[michielmulders]

Problem

The tool doesn't allow to set a metadata key or define token-level metadata.

Solution

• Add metadata key option (normal creation flow and templated creation)
• Ability to add token-level metadata
  Resource: https://medium.com/hedera/enabling-dynamic-nfts-on-hedera-exploring-hip-646-hip-657-and-hip-765-a4dcd2b58b7b

Don't forget to update dynamic variable options for the metadata key options.

Alternatives

No response