Add Rust Playground metadata #1076

Job	Run time
rustfmt	13s
Doc tests	29s
Minimal crates versions (stable, ubuntu)	29s
Clippy	14s
Minimal crates versions (stable, macOS)	39s
Test features	42s
Minimal crates versions (stable, windows)	54s
Test Rust stable on ubuntu	20s
Test Rust stable on macOS	26s
Test Rust stable on windows	51s
Test Rust nightly on ubuntu	17s
Test Rust nightly on macOS	22s
Test Rust nightly on windows	57s
Test Rust 1.65.0 on ubuntu	2m 5s
Test Rust 1.65.0 on macOS	2m 6s
Test Rust 1.65.0 on windows	2m 45s
	13m 49s

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