Request to Add Practical Agent Examples to Improve A2A Documentation

Hi maintainers 👋

First of all, thank you for building and maintaining the A2A protocol — it's a very interesting and promising approach for agent-to-agent communication.

While working with the official documentation, I found it quite challenging to implement agents directly from the docs because there are very few (or no) end-to-end practical examples. The documentation explains concepts well, but translating those into working code requires a lot of trial and interpretation.

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## Problem

- Lack of concrete, runnable examples makes onboarding difficult
- Hard to understand how different components connect in a real implementation
- Increases development time due to ambiguity in usage patterns

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## Proposal

To help improve developer experience, I would like to contribute a set of **working agent examples** that I built while learning the A2A protocol. These examples aim to:

- Demonstrate real-world usage of A2A agents
- Provide clear structure for building and connecting agents
- Serve as a starting point for new developers
- Reduce the learning curve significantly

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## Contribution Details

I have already implemented a few agents based on my understanding of the documentation, and I’d be happy to:

- Clean up and document the code
- Follow repository contribution guidelines
- Add explanations and usage instructions
- Structure them in a way that fits the current docs/repo

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## Request

I would like to request approval/feedback on:

1. Whether contributing these examples would be helpful for the project
2. Preferred format/location (e.g., `examples/` directory, docs section, etc.)
3. Any specific guidelines I should follow before submitting a PR

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I believe these examples can significantly improve accessibility for new developers working with A2A.

Looking forward to your guidance — happy to iterate based on your feedback 🙌

Thanks!