Add an option to display the doc on the left. #496

Job	Run time
test (ubuntu-latest, 27.2, false)	56s
test (ubuntu-latest, 28.2, false)	59s
test (ubuntu-latest, 29.3, false)	56s
test (macos-latest, 27.2, false)	2m 4s
test (macos-latest, 28.2, false)	2m 38s
test (macos-latest, 29.3, false)	2m 16s
test (windows-latest, 27.2, false)	1m 32s
test (windows-latest, 28.2, false)	1m 24s
test (windows-latest, 29.3, false)	1m 41s
test (ubuntu-latest, snapshot, true)	49s
test (macos-latest, snapshot, true)	2m 5s
test (windows-latest, snapshot, true)	1m 4s
	18m 24s

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