chore(iroh): Add echo-no-router.rs example

[matheus23]

Description

Adds an example showing how to implement a basic protocol without using a Router.
As a bonus, one can compare what echo.rs and echo-no-router.rs are doing to see the difference.

Notes & open questions

I think this is slightly useful, but YMMV. I don't think it's a lot of work to maintain though.

Change checklist

• Self-review.

[flub]

I think I would go for a sub-directory called "router" and move the router examples into there. But that might be more controversial.

Anyway, all comments rather cosmetic and I don't mind if you do something about them or not. Apart from the connect-side not closing the endpoint. That's rather critical.

[matheus23]

Anyway, all comments rather cosmetic and I don't mind if you do something about them or not. Apart from the connect-side not closing the endpoint. That's rather critical.

Please re-review :)

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3267/docs/iroh/

Last updated: 2025-04-17T09:04:28Z

[github-actions]

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Last updated for commit: 9c8589d

[flub]

Oh, good catch on also fixing the original example!