feat: some llms.txt improvements #96

Job	Run time
generate (api-links, ./node/lib/*.js)	29s
generate (man-page, ./node/doc/api/cli.md)	27s
generate (addon-verify, ./node/doc/api/addons.md)	25s
generate (orama-db, ./node/doc/api/*.md)	41s
generate (legacy-html, ./node/doc/api/*.md)	1m 3s
generate (legacy-json, ./node/doc/api/*.md)	57s
generate (llms-txt, ./node/doc/api/*.md)	37s
generate (json-simple, ./node/doc/api/*.md)	37s
	5m 16s

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