feat(repl): Add the Elisp REPL command #881

Job	Run time
test (ubuntu-latest, 26.3, false)	1m 31s
test (ubuntu-latest, 27.2, false)	1m 24s
test (ubuntu-latest, 28.2, false)	1m 26s
test (ubuntu-latest, 29.1, false)	1m 31s
test (macos-latest, 26.3, false)	3m 17s
test (macos-latest, 27.2, false)	3m 3s
test (macos-latest, 28.2, false)	4m 1s
test (macos-latest, 29.1, false)	3m 21s
test (windows-latest, 26.3, false)	3m 43s
test (windows-latest, 27.2, false)	2m 51s
test (windows-latest, 28.2, false)	2m 46s
test (windows-latest, 29.1, false)	2m 58s
test (ubuntu-latest, snapshot, true)	1m 27s
test (macos-latest, snapshot, true)	3m 14s
test (windows-latest, snapshot, true)	43s
	37m 16s

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