Rust

Enhance README with build time improvements and feature flag details … #1511

Job	Run time
Verify Vendored Code	1m 19s
Check cargo fmt	1m 6s
Verify MSRV (Min Supported Rust Version)	4m 50s
build and run with wasm-pack	4m 49s
cargo test (macos-aarch64)	18m 53s
linux build test	5m 39s
cargo check datafusion-substrait features	10m 2s
cargo check datafusion-proto features	4m 28s
cargo check datafusion-common features	1m 45s
cargo test (amd64)	12m 1s
cargo check datafusion features	11m 26s
cargo check datafusion-functions features	2m 23s
cargo examples (amd64)	13m 36s
Run sqllogictest with Postgres runner	6m 28s
cargo test datafusion-cli (amd64)	4m 18s
check configs.md and ***_functions.md is up-to-date	5m 17s
clippy	6m 19s
check example README is up-to-date	37s
Run sqllogictest in Substrait round-trip mode	6m 6s
check Cargo.toml formatting	3m 33s
cargo test doc (amd64)	8m 44s
verify benchmark results (amd64)	10m 36s
cargo doc	5m 37s
	2h 29m 52s

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