Add stub Ruby commands for all Bash commands. #28741

Job	Run time
syntax	59s
formula audit	6m 34s
vendored gems	37s
docker	4m 33s
cask audit	2m 50s
tap syntax	5m 0s
test default formula (Ubuntu 22.04)	4m 16s
tests (online)	8m 48s
test default formula (Ubuntu 20.04)	6m 47s
update-test (Ubuntu 22.04)	38s
tests (generic OS)	5m 53s
test default formula (macOS 13 x86_64)	2m 28s
update-test (macOS 13)	26s
tests (Ubuntu 22.04)	6m 1s
test default formula (macOS 14 arm64)	1m 14s
tests (Ubuntu 20.04)	7m 18s
tests (macOS 13 x86_64)	6m 39s
tests (macOS 14 arm64)	4m 3s
	1h 15m 4s

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