Add .cargo/config.toml example #1795

Job	Run time
Sanitizer	37s
Linux (x86_64-unknown-linux-musl)	15s
iOS Simulator	2m 56s
Linux (i686-unknown-linux-musl)	14s
Tier 1 (ubuntu-24.04, nightly)	16s
Tier 1 (ubuntu-24.04, beta)	15s
Windows (stable-x86_64-gnu)	49s
Tier 1 (ubuntu-24.04, stable)	16s
Windows 7 (on Windows 10)	1m 18s
Windows (stable-i686-gnu)	41s
Cross (aarch64-unknown-linux-gnu)	33s
Tier 1 (ubuntu-24.04, 1.63)	25s
Windows (stable-i686-msvc)	46s
Cross (powerpc-unknown-linux-gnu)	25s
Tier 1 (windows-2022, nightly)	42s
Tier 1 (windows-2022, beta)	36s
FreeBSD VM	2m 43s
Tier 1 (windows-2022, stable)	2m 4s
OpenBSD VM	2m 30s
WASI	21s
Tier 1 (windows-2022, 1.63)	39s
Web	1m 2s
Tier 1 (macos-14, stable)	15s
Web with Atomics	1m 4s
	21m 42s

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