[Bug]: Please provide detail to build A2A Curated Registries

### What happened?

Kindly provide more details to build and implement Curated Registries

[Curated Registries](https://a2a-protocol.org/latest/topics/agent-discovery/#2-curated-registries-catalog-based-discovery)

The current A2A docs seem to provide good content of this registry concept, I could not find details to implement this. Thanks

### Relevant log output

```shell

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### Code of Conduct

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