Implement Non-Fungible Token Creation

[jaycoolh]

Description:
Implement creation of a non-fungible token (NFT) with only the minimal required attributes (e.g., name, symbol, decimals, supply). This is part of extending the Hedera Token Service within the Agent Kit to handle NFTs.

Roadmap Reference: ROADMAP.md > Native Hedera Token Service > Non-Fungible Token Creation

Proposed Implementation/Tasks:

• Add a function to create an NFT with minimal attributes.
• Integrate with Hedera SDK to support NFT creation with the SDK.
• Provide simple test coverage (unit/integration).

Checklist:

• Create a new function or tool for NFT creation.
• Update documentation/README if needed.
• Write tests (e.g., unit or integration tests).

Additional Context/Notes:

• Currently, we have fungible token creation. This feature should be similar, but account for NFT logic.
• Keep the logic minimal; advanced features (like custom royalty fees) can come later.

Milestone: v0.1 - Token Service

DCO Requirement:
All commits must be DCO-signed. Please run git commit -s.

Assignees: tbc