ci: add pr-fast and nightly validation workflows #69

Job	Run time
build-linux-host-simd	6m 21s
build (aarch64-apple-darwin, macos-latest)	5m 12s
build (x86_64-apple-darwin, macos-latest)	4m 27s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	3m 26s
build (aarch64-unknown-linux-gnu, ubuntu-latest)	4m 13s
release	1s
	23m 40s

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