chore(gitignore): ignore local out runtime artifacts #96

Job	Run time
build (x86_64-unknown-linux-gnu, ubuntu-latest)	2m 15s
build-linux-host-simd	3m 37s
build (x86_64-apple-darwin, macos-latest)	3m 39s
build (aarch64-unknown-linux-gnu, ubuntu-latest)	3m 32s
build (aarch64-apple-darwin, macos-latest)	3m 22s
release	1s
	16m 26s

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