refactor(tests): split up test suites, update docs #915

Job	Run time
build-splicer (windows-latest)	21s
build-splicer (ubuntu-latest)	5s
lint	44s
build (weval)	14s
build (debug)	14s
build (release)	9s
test (23.10.0, windows-latest, release)	7m 14s
test (23.10.0, windows-latest, debug)	9m 21s
test (23.10.0, ubuntu-latest, weval)	8m 53s
test (23.10.0, ubuntu-latest, debug)	6m 49s
test (23.10.0, ubuntu-latest, release)	6m 10s
test-example	34s
test (23.10.0, macos-latest, release)	5m 11s
test (23.10.0, windows-latest, weval)	9m 21s
test (23.10.0, macos-latest, debug)	7m 22s
test (23.10.0, macos-latest, weval)	9m 33s
	1h 12m 15s

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