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feat: add `preview:docs` & `preview:node` scripts #2004

Job	Run time
prepare	13s
generate (json-simple, ./node/doc/api/*.md)	53s
generate (api-links, ./node/lib/*.js, object-assertion)	33s
generate (addon-verify, ./node/doc/api/addons.md)	31s
generate (legacy-html, ./node/doc/api/*.md, file-size)	1m 12s
generate (web, ./node/doc/api/*.md, file-size)	2m 35s
generate (legacy-json, ./node/doc/api/*.md, object-assertion)	53s
generate (man-page, ./node/doc/api/cli.md)	32s
generate (llms-txt, ./node/doc/api/*.md, file-size)	46s
generate (orama-db, ./node/doc/api/*.md, file-size)	53s
	9m 1s