feat(metabar): subtle indicators #609

Job	Run time
prepare	11s
generate (api-links, ./node/lib/*.js, object-assertion)	34s
generate (man-page, ./node/doc/api/cli.md)	28s
generate (orama-db, ./node/doc/api/*.md, file-size)	35s
generate (addon-verify, ./node/doc/api/addons.md)	29s
generate (legacy-json, ./node/doc/api/*.md, object-assertion)	38s
generate (legacy-html, ./node/doc/api/*.md, file-size)	49s
generate (web, ./node/doc/api/*.md, file-size)	1m 8s
generate (llms-txt, ./node/doc/api/*.md, file-size)	35s
generate (json-simple, ./node/doc/api/*.md)	34s
	6m 1s

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