feat: executable command #8241

Job	Run time
build test linux x86-64	5m 18s
check-rust	4m 34s
scarb-metadata compatibility check	49s
build test windows x86-64	14m 46s
check-website	11s
doc tests	3m 21s
test linux x86-64 1/8	15m 52s
test linux x86-64 2/8	26m 25s
test linux x86-64 3/8	22m 2s
test linux x86-64 4/8	18m 6s
test linux x86-64 5/8	14m 56s
test linux x86-64 6/8	15m 15s
test linux x86-64 7/8	13m 28s
test linux x86-64 8/8	10m 43s
test windows x86-64 1/8	22m 55s
test windows x86-64 2/8	24m 8s
test windows x86-64 3/8	21m 29s
test windows x86-64 4/8	15m 55s
test windows x86-64 5/8	15m 40s
test windows x86-64 6/8	14m 9s
test windows x86-64 7/8	13m 13s
test windows x86-64 8/8	10m 29s
	5h 3m 44s

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