feat(repl): Add the Elisp REPL command #873

Job	Run time
test (ubuntu-latest, 26.3, false)	43s
test (ubuntu-latest, 27.2, false)	33s
test (ubuntu-latest, 28.2, false)	37s
test (ubuntu-latest, 29.1, false)	34s
test (macos-latest, 26.3, false)	2m 9s
test (macos-latest, 27.2, false)	3m 48s
test (macos-latest, 28.2, false)	2m 37s
test (macos-latest, 29.1, false)	2m 7s
test (windows-latest, 26.3, false)	2m 28s
test (windows-latest, 27.2, false)	51s
test (windows-latest, 28.2, false)	49s
test (windows-latest, 29.1, false)	1m 0s
test (ubuntu-latest, snapshot, true)	29s
test (macos-latest, snapshot, true)	1m 59s
test (windows-latest, snapshot, true)	52s
	21m 36s

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