refactor(tests): split up test suites, update docs #899

Job	Run time
build-splicer (windows-latest)	11s
build-splicer (ubuntu-latest)	7s
lint	47s
build (debug)	14s
build (weval)	13s
build (release)	7s
test-example	45s
test (23.10.0, ubuntu-latest, weval)	3m 15s
test (23.10.0, ubuntu-latest, release)	3m 15s
test (23.10.0, macos-latest, debug)	3m 21s
test (23.10.0, macos-latest, release)	3m 18s
test (23.10.0, windows-latest, weval)	3m 12s
test (23.10.0, ubuntu-latest, debug)	3m 15s
test (23.10.0, windows-latest, debug)	3m 12s
test (23.10.0, macos-latest, weval)	3m 19s
test (23.10.0, windows-latest, release)	3m 11s
	31m 42s

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