chore(vendor): add anyhow crate

third_party/crates/clap-4.6.7/examples/README.md

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+# Examples
+
+We try to focus our documentation on the [four types of
+documentation](https://documentation.divio.com/).  Examples fit into this by
+providing:
+- [Cookbook / How-To Guides](https://docs.rs/clap/latest/clap/_cookbook/index.html)
+- Tutorials ([derive](https://docs.rs/clap/latest/clap/_derive/_tutorial/index.html), [builder](https://docs.rs/clap/latest/clap/_tutorial/index.html))
+
+This directory contains the source for the above.
+
+## Contributing
+
+New examples should fit within the above structure and support their narrative
+- Add the example to [Cargo.toml](../Cargo.toml) for any `required-features`
+- Document how the example works with a `.md` file which will be verified using [trycmd](https://docs.rs/trycmd)
+- Pull the `.rs` and `.md` file into the appropriate module doc comment to be accessible on docs.rs