include support for `theme` option #57

Job	Run time
build (ubuntu-latest, 25.3, false)	35s
build (ubuntu-latest, 26.3, false)	41s
build (ubuntu-latest, 27.2, false)	39s
build (ubuntu-latest, 28.2, false)	40s
build (ubuntu-latest, 29.4, false)	1m 28s
build (macos-latest, 25.3, false)	35s
build (macos-latest, 26.3, false)	37s
build (macos-latest, 27.2, false)	41s
build (macos-latest, 28.2, false)	40s
build (macos-latest, 29.4, false)	1m 35s
build (windows-latest, 25.3, false)	35s
build (windows-latest, 26.3, false)	33s
build (windows-latest, 27.2, false)	43s
build (windows-latest, 28.2, false)	39s
build (windows-latest, 29.4, false)	49s
build (ubuntu-latest, snapshot, true)	36s
build (macos-latest, snapshot, true)	33s
build (windows-latest, snapshot, true)	37s
	13m 16s

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