refactor: splicer WIT and generated bindings #815

Job	Run time
lint	8s
build-splicer (windows-latest)	4m 0s
build-splicer (ubuntu-latest)	2m 6s
build (release)	7s
build (debug)	7s
build (weval)	10s
test-example	37s
test (23.10.0, ubuntu-latest, debug)	13s
test (23.10.0, windows-latest, debug)	31s
test (23.10.0, windows-latest, release)	34s
test (23.10.0, ubuntu-latest, weval)	14s
test (23.10.0, windows-latest, weval)	35s
test (23.10.0, ubuntu-latest, release)	15s
test (23.10.0, macos-latest, release)	21s
test (23.10.0, macos-latest, debug)	24s
test (23.10.0, macos-latest, weval)	17s
	10m 39s

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