refactor(tests): split up test suites, update docs #914

Job	Run time
build-splicer (ubuntu-latest)	5s
build-splicer (windows-latest)	14s
lint	46s
build (debug)	9s
build (release)	10s
build (weval)	9s
test-example	38s
test (23.10.0, ubuntu-latest, release)	6m 13s
test (23.10.0, windows-latest, release)	7m 22s
test (23.10.0, ubuntu-latest, weval)	9m 10s
test (23.10.0, windows-latest, debug)	8m 28s
test (23.10.0, ubuntu-latest, debug)	6m 53s
test (23.10.0, windows-latest, weval)	12m 45s
test (23.10.0, macos-latest, release)	6m 7s
test (23.10.0, macos-latest, debug)	9m 25s
test (23.10.0, macos-latest, weval)	13m 40s
	1h 22m 14s

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