feat: add handler to nc creation list API

[pedroferreira1]

Acceptance Criteria

• Add handler for hathor core nano creation list API.
• Update all 3 APIs to substitute the find parameters for search parameter.

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[tuliomir]

question: This time period is approximately 10 blocks at our current config. Does this mean a new nano-contract will have to wait up to this time to be displayed in the search results/api responses?

If so, this time seems a bit too high for this specific feature.