Rust

Changed: Document system prompt preview examples and token efficiency #274

Job	Run time
Build and Test (Async/Tokio) (ubuntu-latest, x86_64-unknown-linux-gnu, false)	48s
Build and Test (Blocking) (windows-latest, x86_64-pc-windows-msvc, false)	2m 0s
Build and Test (Blocking) (macos-latest, aarch64-apple-darwin, false)	1m 7s
Build and Test (Blocking) (ubuntu-latest, x86_64-unknown-linux-gnu, false)	26s
Build and Test (Async/Tokio) (windows-latest, x86_64-pc-windows-msvc, false)	2m 47s
Build and Test (Async/Tokio) (macos-latest, aarch64-apple-darwin, false)	1m 16s
publish-crate	0s
	8m 24s

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