chore: use public openapi spec for the api #85

Job	Run time
test (18.x)	1m 18s
test (20.x)	1m 43s
codeql / Analyze (javascript-typescript)	1m 25s
codeql / Analyze (actions)	1m 18s
build-docs	0s
release	0s
	5m 44s

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