Enable tree sitter code only when it's enabled #234

Job	Run time
test (ubuntu-latest, 26.3, false)	39s
test (ubuntu-latest, 27.2, false)	29s
test (ubuntu-latest, 28.2, false)	40s
test (ubuntu-latest, 29.1, false)	41s
test (macos-latest, 26.3, false)	2m 8s
test (macos-latest, 27.2, false)	1m 58s
test (macos-latest, 28.2, false)	2m 1s
test (macos-latest, 29.1, false)	2m 34s
test (windows-latest, 26.3, false)	1m 58s
test (windows-latest, 27.2, false)	50s
test (windows-latest, 28.2, false)	1m 6s
test (windows-latest, 29.1, false)	51s
test (ubuntu-latest, snapshot, true)	39s
test (macos-latest, snapshot, true)	2m 7s
test (windows-latest, snapshot, true)	34s
	19m 15s

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