Support Metadata Key

### 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](https://github.com/hashgraph/hedera-cli?tab=readme-ov-file#mapping-dynamic-variables-to-commands) options for the metadata key options.**

### Alternatives

_No response_

Locate the normal creation flow, templated creation flow, and the dynamic variable options in the README section linked by the issue. Read how existing creation options are exposed and how token data is passed. Done means metadata keys and token-level metadata are supported in both creation flows, with the dynamic variable documentation updated.

Written by the indexing model from the issue text.